He is the first AL pitcher to pull this off since Pedro Martinez in 1999.
Chris Sale has been having an excellent first year in Boston.
The former Cy Young Award winner entered Wednesday with a 2.86 ERA and a 16-7 record for the first-place Red Sox.
On Wednesday, against the Orioles, Sale did something no other AL Pitcher has done since 1999 by throwing his 300th strikeout.
Sale pitched eight innings of shutout ball and surrendered only four hits while getting 13 strikeouts in the 9-0 Boston win.
Pedro Martinez was the last AL pitcher to toss at least 300 strikeouts in a year, and now he and Sale are the only Red Sox pitchers to accomplish the feat.
The last pitcher in either league to pull this off was Clayton Kershaw in 2015.