Lewis missed the 2013 season due to injury, but returned to make 29 starts in 2014. He was 10-14 with a 5.18 ERA and 1.521 WHIP in 170.1 innings. His statistics were significantly better in the second half of the season than they were in the first half. Hitters batted .353 against him in the first half, compared to .251 after the All-Star break.
"We're glad to have Colby back," Rangers general manager Jon Daniels said, according to the team's website. "Really, over the last five years, he has been everything we are about. He throws strikes, eats innings and takes the ball. He's the type of pitcher our young guys can look up to."
The Rangers finished in last place in the AL West last season with a 67-95 record.
- Dan Gartland