The 1980 Toronto Blue Jays season was the franchise's fourth season of Major League Baseball. It resulted in the Blue Jays finishing seventh in the American League East with a record of 67 wins and 95 losses. The season represented a turning point as Bobby Mattick became the second field manager in franchise history.

Offseason Transactions Transactions by the Toronto Blue Jays during the off-season before the 1980 season. October 1979 Released Dave Freisleben. Released Craig Kusick.

November 1979 Tim Johnson granted free agency. Tony Solaita granted free agency. Acquired Chris Chambliss, Dámaso García and Paul Mirabella from the New York Yankees for Rick Cerone, Tom Underwood and Ted Wilborn. Purchased Domingo Ramos from the Texas Rangers. Released Dave McKay.

December 1979 Drafted Mike Macha from the Atlanta Braves in the 1979 MLB Rule 5 draft. Drafted Mitch Webster from the Los Angeles Dodgers in the 1979 MLB Rule 5 draft. Acquired Barry Bonnell, Joey McLaughlin and Pat Rockett from the Atlanta Braves for Chris Chambliss and Luis Gómez. Player rights of Andre Robertson sold to the New York Yankees.

January 1980 Released Dale Mohorcic. Signed free agent Jack Kucek from the Philadelphia Phillies to a contract.

March 1980 Acquired Mike Barlow from the California Angels for Mark Wiley. Released Rico Carty. Released Steve Luebber.

Regular season One of the highlights for the 1980 Blue Jays was the emergence of Dave Stieb as a quality starter. Also, on May 4, Otto Vélez hit four home runs in a doubleheader sweep of the Cleveland Indians, including a walk-off shot in the first game.

Season standings

Record vs. opponents

Opening Day starters Barry Bonnell Rick Bosetti Dámaso García Alfredo Griffin Roy Howell John Mayberry Dave Stieb Otto Vélez Ernie Whitt Alvis Woods

Transactions Transactions for the Toronto Blue Jays during the 1980 regular season. April 1980 Released Butch Edge. Player rights of Mark Lemongello sold to the Chicago Cubs.

May 1980 Player rights of Mike Macha sold to the Detroit Tigers.

June 1980 Traded Dave Lemanczyk to the California Angels for a player to be named later (Ken Schrom on June 10, 1980). Purchased Steve Baker from the Detroit Tigers. Purchased Charlie Beamon Jr. from the Seattle Mariners. Signed free agent Steve Braun from the Kansas City Royals to a contract.

July 1980 Signed amateur free agent Dave Shipanoff.

August 1980 Released Tom Buskey.

September 1980 Released Balor Moore. Jesse Jefferson selected by the Pittsburgh Pirates off waivers.

Roster 1980 Toronto Blue Jays roster Roster Pitchers Catchers

Infielders Outfielders Manager

Coaches (Hitting) (Bullpen) (First Base) (Pitching) (Third Base)

Game log

|- align="center" bgcolor="ffbbbb" | 1 || April 9 || @ Mariners || 6–8 || Parrott (1–0) || Lemanczyk (0–1) || Heaverlo (1) || 22,588 || 0–1 |- align="center" bgcolor="bbffbb" | 2 || April 11 || @ Mariners || 10–7 (11) || Moore (1–0) || Dressler (0–1) || || 6,104 || 1–1 |- align="center" bgcolor="ffbbbb" | 3 || April 12 || @ Mariners || 2–3 (10) || Honeycutt (1–0) || Garvin (0–1) || || 6,773 || 1–2 |- align="center" bgcolor="ffbbbb" | 4 || April 13 || @ Mariners || 1–5 || Bannister (1–0) || Lemanczyk (0–2) || || 4,567 || 1–3 |- align="center" bgcolor="bbbbbb" | – || April 14 || Brewers || colspan=6|Postponed (rain) Rescheduled for July 13 |- align="center" bgcolor="bbffbb" | 5 || April 16 || Brewers || 11–2 || Stieb (1–0) || Slaton (0–1) || || 12,688 || 2–3 |- align="center" bgcolor="bbffbb" | 6 || April 17 || Brewers || 1–0 || Mirabella (1–0) || Sorensen (1–1) || || 11,235 || 3–3 |- align="center" bgcolor="ffbbbb" | 7 || April 19 || @ Indians || 1–8 || Waits (1–1) || Clancy (0–1) || || 61,753 || 3–4 |- align="center" bgcolor="bbffbb" | 8 || April 20 || @ Indians || 5–3 || Lemanczyk (1–2) || Denny (0–2) || McLaughlin (1) || 11,220 || 4–4 |- align="center" bgcolor="bbffbb" | 9 || April 21 || @ Royals || 7–1 || Stieb (2–0) || Gale (0–2) || || 21,117 || 5–4 |- align="center" bgcolor="ffbbbb" | 10 || April 22 || @ Royals || 2–7 || Splittorff (2–0) || Mirabella (1–1) || || 16,993 || 5–5 |- align="center" bgcolor="ffbbbb" | 11 || April 23 || @ Royals || 4–7 || Christenson (1–0) || McLaughlin (0–1) || Quisenberry (2) || 18,855 || 5–6 |- align="center" bgcolor="bbffbb" | 12 || April 25 || @ Brewers || 5–3 || McLaughlin (1–1) || Sorensen (1–2) || || 9,902 || 6–6 |- align="center" bgcolor="bbffbb" | 13 || April 26 || @ Brewers || 4–0 || Stieb (3–0) || Caldwell (2–1) || || 11,038 || 7–6 |- align="center" bgcolor="bbffbb" | 14 || April 27 || @ Brewers || 8–2 || Mirabella (2–1) || Haas (1–3) || Moore (1) || 11,099 || 8–6 |- align="center" bgcolor="bbbbbb" | – || April 28 || Royals || colspan=6|Postponed (rain) Rescheduled for August 8 |- align="center" bgcolor="bbffbb" | 15 || April 29 || Royals || 3–1 || Clancy (1–1) || Leonard (0–3) || || 11,553 || 9–6 |- align="center" bgcolor="ffbbbb" | 16 || April 30 || Royals || 0–3 || Gura (3–1) || Jefferson (0–1) || || 14,029 || 9–7

|- align="center" bgcolor="ffbbbb" | 17 || May 1 || Indians || 1–2 || Denny (1–2) || Lemanczyk (1–3) || Monge (2) || 11,654 || 9–8 |- align="center" bgcolor="ffbbbb" | 18 || May 2 || Indians || 1–6 || Barker (3–1) || Stieb (3–1) || || 14,292 || 9–9 |- align="center" bgcolor="bbffbb" | 19 || May 3 || Indians || 8–3 || Buskey (1–0) || Waits (1–3) || || 16,564 || 10–9 |- align="center" bgcolor="bbffbb" | 20 || May 4 || Indians || 9–8 (10) || Buskey (2–0) || Monge (0–1) || || || 11–9 |- align="center" bgcolor="bbffbb" | 21 || May 4 || Indians || 7–2 || Jefferson (1–1) || Owchinko (0–3) || McLaughlin (2) || 26,114 || 12–9 |- align="center" bgcolor="bbffbb" | 22 || May 6 || @ Angels || 3–2 || Lemanczyk (2–3) || Aase (3–2) || Garvin (1) || 23,804 || 13–9 |- align="center" bgcolor="bbffbb" | 23 || May 7 || @ Angels || 7–3 || Stieb (4–1) || Knapp (0–2) || || 21,733 || 14–9 |- align="center" bgcolor="bbffbb" | 24 || May 8 || @ Angels || 9–2 || Mirabella (3–1) || Frost (3–3) || || 23,006 || 15–9 |- align="center" bgcolor="bbbbbb" | – || May 9 || @ Athletics || colspan=6|Postponed (rain) Rescheduled for July 22 |- align="center" bgcolor="ffbbbb" | 25 || May 10 || @ Athletics || 3–4 || Langford (3–1) || Garvin (0–2) || || 4,925 || 15–10 |- align="center" bgcolor="ffbbbb" | 26 || May 11 || @ Athletics || 1–12 || Norris (5–0) || Lemanczyk (2–4) || || 7,843 || 15–11 |- align="center" bgcolor="bbbbbb" | – || May 13 || Mariners || colspan=6|Postponed (rain) Rescheduled for July 26 |- align="center" bgcolor="ffbbbb" | 27 || May 14 || Mariners || 0–7 || Abbott (3–2) || Mirabella (3–2) || || 13,055 || 15–12 |- align="center" bgcolor="bbffbb" | 28 || May 15 || Mariners || 1–0 || Clancy (2–1) || Bannister (2–3) || || 11,579 || 16–12 |- align="center" bgcolor="bbffbb" | 29 || May 16 || Athletics || 1–0 (11)|| Jefferson (2–1) || Norris (5–1) || || 16,138 || 17–12 |- align="center" bgcolor="ffbbbb" | 30 || May 17 || Athletics || 2–4 (14)|| Keough (5–3) || McLaughlin (1–2) || || 23,074 || 17–13 |- align="center" bgcolor="bbffbb" | 31 || May 18 || Athletics || 12–1 || Mirabella (4–2) || Langford (3–2) || || 14,414 || 18–13 |- align="center" bgcolor="bbffbb" | 32 || May 19 || Red Sox || 7–2 || Clancy (3–1) || Billingham (1–1) || || 32,731 || 19–13 |- align="center" bgcolor="ffbbbb" | 33 || May 20 || Red Sox || 3–4 || Rainey (4–0) || Lemanczyk (2–5) || Burgmeier (7) || 18,167 || 19–14 |- align="center" bgcolor="ffbbbb" | 34 || May 21 || Red Sox || 2–11 || Torrez (1–4) || Jefferson (2–2) || || 19,556 || 19–15 |- align="center" bgcolor="ffbbbb" | 35 || May 22 || Yankees || 1–5 || Griffin (1–2) || Stieb (4–2) || || 26,047 || 19–16 |- align="center" bgcolor="ffbbbb" | 36 || May 23 || Yankees || 3–7 || Guidry (5–0) || Mirabella (4–3) || || 24,585 || 19–17 |- align="center" bgcolor="ffbbbb" | 37 || May 24 || Yankees || 2–6 || Tiant (3–2) || Clancy (3–2) || May (3) || 31,021 || 19–18 |- align="center" bgcolor="bbffbb" | 38 || May 25 || Yankees || 9–6 || Leal (1–0) || John (7–2) || || 33,077 || 20–18 |- align="center" bgcolor="bbffbb" | 39 || May 26 || @ Red Sox || 3–1 || Garvin (1–2) || Drago (2–2) || || 18,853 || 21–18 |- align="center" bgcolor="ffbbbb" | 40 || May 27 || @ Red Sox || 4–5 || Renko (3–0) || Buskey (2–1) || || 16,679 || 21–19 |- align="center" bgcolor="bbffbb" | 41 || May 28 || @ Red Sox || 4–1 || Stieb (5–2) || Stanley (3–5) || McLaughlin (3) || 18,215 || 22–19 |- align="center" bgcolor="ffbbbb" | 42 || May 30 || @ Yankees || 0–6 || Tiant (4–2) || Clancy (3–3) || Gossage (5) || 24,319 || 22–20 |- align="center" bgcolor="ffbbbb" | 43 || May 31 || @ Yankees || 6–8 (11)|| May (3–1) || McLaughlin (1–3) || || 25,158 || 22–21

|- align="center" bgcolor="ffbbbb" | 44 || June 1 || @ Yankees || 7–11 || Underwood (5–3) || Mirabella (4–4) || || 52,049 || 22–22 |- align="center" bgcolor="ffbbbb" | 45 || June 2 || Angels || 3–6 || Frost (4–3) || Leal (1–1) || LaRoche (3) || 15,079 || 22–23 |- align="center" bgcolor="bbffbb" | 46 || June 3 || Angels || 7–6 (11)|| McLaughlin (2–3) || LaRoche (1–2) || || 15,589 || 23–23 |- align="center" bgcolor="bbffbb" | 47 || June 4 || Angels || 8–2 || Clancy (4–3) || Martínez (1–1) || || 16,677 || 24–23 |- align="center" bgcolor="bbbbbb" | – || June 5 || @ Twins || colspan=6|Postponed (rain) Rescheduled for June 8 |- align="center" bgcolor="ffbbbb" | 48 || June 6 || @ Twins || 0–5 || Zahn (4–7) || Mirabella (4–5) || || 5,495 || 24–24 |- align="center" bgcolor="ffbbbb" | 49 || June 7 || @ Twins || 2–3 || Jackson (2–3) || Stieb (5–3) || Corbett (5) || 5,375 || 24–25 |- align="center" bgcolor="ffbbbb" | 50 || June 8 || @ Twins || 1–5 || Erickson (1–3) || Jefferson (2–3) || Corbett (6) || || 24–26 |- align="center" bgcolor="bbffbb" | 51 || June 8 || @ Twins || 6–4 (13)|| McLaughlin (3–3) || Arroyo (0–1) || || 17,869 || 25–26 |- align="center" bgcolor="bbffbb" | 52 || June 10 || @ White Sox || 1–0 || Clancy (5–3) || Baumgarten (1–3) || || 18,225 || 26–26 |- align="center" bgcolor="ffbbbb" | 53 || June 11 || @ White Sox || 4–7 || Kravec (3–4) || Mirabella (4–6) || Farmer (14) || 17,537 || 26–27 |- align="center" bgcolor="ffbbbb" | 54 || June 13 || Rangers || 3–6 || Medich (6–3) || Stieb (5–4) || Lyle (6) || 20,034 || 26–28 |- align="center" bgcolor="bbffbb" | 55 || June 14 || Rangers || 7–6 || Buskey (3–1) || Babcock (0–2) || || 24,184 || 27–28 |- align="center" bgcolor="bbffbb" | 56 || June 15 || Rangers || 5–3 || Clancy (6–3) || Jenkins (4–5) || Garvin (2) || 30,143 || 28–28 |- align="center" bgcolor="ffbbbb" | 57 || June 16 || Twins || 0–4 || Zahn (5–9) || Jefferson (2–4) || || 14,691 || 28–29 |- align="center" bgcolor="ffbbbb" | 58 || June 17 || Twins || 6–8 || Corbett (4–2) || Mirabella (4–7) || || 15,229 || 28–30 |- align="center" bgcolor="bbffbb" | 59 || June 18 || White Sox || 5–4 || Stieb (6–4) || Trout (2–7) || || || 29–30 |- align="center" bgcolor="bbffbb" | 60 || June 18 || White Sox || 3–1 || Kucek (1–0) || Dotson (6–3) || McLaughlin (4) || 21,443 || 30–30 |- align="center" bgcolor="bbbbbb" | – || June 19 || White Sox || colspan=6|Postponed (rain) Rescheduled for September 7 |- align="center" bgcolor="ffbbbb" | 61 || June 20 || @ Rangers || 2–5 || Jenkins (5–5) || Garvin (1–3) || || 13,747 || 30–31 |- align="center" bgcolor="ffbbbb" | 62 || June 21 || @ Rangers || 1–2 || Matlack (4–3) || McLaughlin (3–4) || || 17,846 || 30–32 |- align="center" bgcolor="bbffbb" | 63 || June 22 || @ Rangers || 6–5 (10)|| Garvin (2–3) || Kern (2–9) || || 13,650 || 31–32 |- align="center" bgcolor="ffbbbb" | 64 || June 24 || @ Orioles || 0–1 || McGregor (7–3) || Stieb (6–5) || || 14,884 || 31–33 |- align="center" bgcolor="ffbbbb" | 65 || June 25 || @ Orioles || 3–6 || Palmer (7–4) || Leal (1–2) || || 14,588 || 31–34 |- align="center" bgcolor="ffbbbb" | 66 || June 26 || @ Orioles || 1–4 || Stone (10–3) || Clancy (6–4) || || 13,023 || 31–35 |- align="center" bgcolor="ffbbbb"