Now, it's not necessarily correct to take a player's numbers away from Coors Field and assume that's the real him - three of the other four NL West parks are big-time pitcher's parks, after all - but clearly Chatwood is someone who could benefit from the move out of Colorado. He registered a 6.01 ERA and allowed foes to hit.302 at Coors Field last season.
Chatwood, 27, is 40-46 with two saves and a 4.31 ERA in 130 major-league appearances - including 113 starts - with the Angels (2011) and Rockies (2012-14, 2016-17).
Chatwood, a second-round pick by the Angels in 2008, spent seven seasons with the Angels and Rockies, but missed the entire 2015 after undergoing reconstructive elbow surgery.
Chatwood's best season was 2013, when he had a 3.15 ERA in 20 starts.
Chatwood will join Jon Lester, Kyle Hendricks, and Jose Quintana in the team's rotation.
The money might be a little pricey for what they'll get from Chatwood, but with Mike Minor off the market at three years for $28 million and his ability to start, it's not that much of an overpay and the Cubs would have ponied up far more to keep Arrieta.