Bauer spoke about the new pitch in a tweet Tuesday. He retweeted a highlight from his game Monday against the San Diego Padres. Bauer allowed four hits and three runs while tossing nine strikeouts in 5.2 innings in the 3-1 loss.
The highlight video featured several of his strikeouts.
"Would be a real shame if I developed a plus changeup this off-season to complement a plus curveball slider and cutter," Bauer tweeted.
Bauer -- who has been linked to off-season trade rumors -- posted a career-best 2.21 ERA last season for the Indians. He also was 12-6 in 28 games en route to his first All-Star selection. Bauer, 28, owns a career 3.94 ERA and 59-47 record in seven seasons.
He is due $13 million this season and is eligible for arbitration in 2020.
Would be a real shame if I developed a plus changeup this off season to compliment a plus curveball slider and cutter... pic.twitter.com/l8gwrZOBBf- Trevor Bauer (@BauerOutage) March 18, 2019
Bauer posted a career-high 221 strikeouts in 2018, good for sixth in the American League. Fellow Indians pitcher Corey Kluber had 222 strikeouts last season.