List of Major League Baseball pitchers who have thrown an immaculate inning

There have been only four instances where a team both threw an immaculate inning, and were on the receiving end of the very next immaculate inning. The first time was when [[Bill Wilson (pitcher)|Bill Wilson]], of the [[Philadelphia Phillies]] threw an immaculate inning against the [[Atlanta Braves]] on July 6, 1971. Just four days later, on July 10, 1971, [[John Strohmayer]], of the [[Montreal Expos]] threw an immaculate inning against the Philadelphia Phillies. The most recent time saw [[José Alvarado (baseball)|Jose Alvarado]], of the [[Tampa Bay Rays]] do it on August 4, 2017 against the [[Milwaukee Brewers]]. Then, five days later, on August 9, 2017, [[Boston Red Sox]] pitcher [[Rick Porcello]] would throw an immaculate inning against the [[Tampa Bay Rays]]. The [[Houston Astros]] are the only team to have this happen twice, in 1991 and 2004, but the latter was unique in that it only involved two teams, as opposed to three teams in the other three instances. On April 15, 2004, [[Houston Astros]] pitcher [[Brandon Backe]] threw an immaculate inning against the [[Milwaukee Brewers]]. Less than two months later, on June 13, 2004, [[Ben Sheets]], of the [[Milwaukee Brewers]] would throw the next immaculate inning against the same team that just threw one against his Brewers, the [[Houston Astros]].

There have been only four instances where a team both threw an immaculate inning, and were on the receiving end of the very next immaculate inning. The first time was when [[Bill Wilson (pitcher)|Bill Wilson]], of the [[Philadelphia Phillies]] threw an immaculate inning against the [[Atlanta Braves]] on July 6, 1971. Just four days later, on July 10, 1971, [[John Strohmayer]], of the [[Montreal Expos]] threw an immaculate inning against the Philadelphia Phillies. The most recent time saw [[José Alvarado (baseball)|Jose Alvarado]], of the [[Tampa Bay Rays]] do it on August 4, 2017 against the [[Milwaukee Brewers]]. Then, five days later, on August 9, 2017, [[Boston Red Sox]] pitcher [[Rick Porcello]] would throw an immaculate inning against the [[Tampa Bay Rays]]. The [[Houston Astros]] are the only team to have this happen twice, in 1991 and 2004, but the latter was unique in that it only involved two teams, as opposed to three teams in the other three instances. On April 15, 2004, [[Houston Astros]] pitcher [[Brandon Backe]] threw an immaculate inning against the [[Milwaukee Brewers]]. Less than two months later, on June 13, 2004, [[Ben Sheets]], of the [[Milwaukee Brewers]] would throw the next immaculate inning against the same team that just threw one against his Brewers, the [[Houston Astros]].

As of the current 2026 season, the Rangers are the only teams to never have thrown at least one immaculate inning in their history.

As of the current 2026 season, the Rangers are the only team to never have thrown at least one immaculate inning in their history.

==Frequency by decade==

==Frequency by decade==