Lyles, 29, split last season between the Pirates and Brewers, performing much better with the latter. Overall, he compiled a 4.15 ERA with a 146 strikeouts and 55 walks across 141 innings. It was a return to full-time starting for Lyles, who had performed mostly as a reliever from 2016-18.
The Rangers also inked Kyle Gibson to a three-year, $30 million contract last week. Gibson and Lyles will join a rotation that also includes Mike Minor and Lance Lynn as well as youngster Kolby Allard.