The Red Sox placed Jansen on the 15-day injured list Monday with right shoulder inflammation, Jen McCaffrey of The Athletic reports.

Jansen (shoulder) threw a perfect ninth inning in Friday's extra-innings loss to the Twins. He did not record a strikeout.

Manager Alex Cora said that Jansen (lat) is available to pitch in Saturday's game against the White Sox, Alex Speier of The Boston Globe reports.

Jansen notched a save against the Blue Jays on Wednesday, striking out one batter in a perfect ninth inning.

Jansen (3-2) was tagged with Monday's loss to the Astros, allowing one run on one hit while striking out one over a third of an inning.

Jansen picked up the save in Friday's 12-10 victory over Baltimore, pitching a clean inning with two strikeouts.

Jansen struck out one in 1.1 perfect innings of relief Tuesday to record his 22nd save of the season in a 9-4 win over the Rangers.

Jansen (back) will be available for Friday's game versus Texas, Ian Browne of MLB.com reports.

Jansen allowed one run on two hits and a walk, picking up a blown save in Saturday's 7-6 extra-innings loss to the Dodgers.

Jansen locked down his 18th save of the year in Sunday's 3-0 win over the Yankees, tossing a clean ninth innings while striking out a batter in the process.