The St. Louis Cardinals acquired left-hander Jon Lester from the Washington Nationals shortly before the Major League Baseball trade deadline on Friday, a source confirmed to The Athletic.

Lester, 37, is 3-5 with a 5.02 ERA and 51 strikeouts in 75 1/3 innings across 16 starts this season, his first with the Nationals. He previously spent six years with the Cubs and eight-plus with the Red Sox, winning a combined three World Series titles.