July 22 (UPI) -- The Kansas City Royals plan to promote Rich Hill from Triple-A, which will make the 45-year-old pitcher the oldest active player in MLB. Royals manager Matt Quatraro confirmed the move Monday night. Hill will start against the Chicago Cubs -- the team that drafted him in 2002 -- on Tuesday in Chicago.

The Kansas City Royals plan to call up 45-year-old pitcher Rich Hill from the minors for a start against the Chicago Cubs on Tuesday, marking the left-hander’s 21st season in the majors.

It's called ABS, or the automatic balls and strikes challenge system, and it creates a 2D adjustable strike zone.