CHICAGO _ Tyler Chatwood threw six scoreless innings in a spot start Sunday afternoon as the Cubs beat the Diamondbacks 2-1 at Wrigley Field.
The Cubs led 1-0 on Javier Baez's run-scoring triple off Robbie Ray in the sixth, but Jarrod Dyson's one-out home run off Pedro Strop in the ninth tied it and denied Chatwood the win.
After Javier Baez doubled leading off the ninth and advanced on Adam Jones' error, Willson Contreras was hit by a pitch. David Bote singled off Archie Bradley to give the Cubs the walk-off win, moving their record to 10-10.
Chatwood started off with a four-pitch walk to the first batter he faced, but settled in and allowed only two hits and two walks over his six innings of work.
He had a 6.00 ERA in four relief outings after losing his spot in the rotation last July. Chatwood was given a chance to start when the Cubs moved Jose Quintana to Tuesday's series opener against the Dodgers.
In a roster move, the Cubs called up right-handed pitcher Alec Mills and optioned left-hander pitcher Randy Rosario to Triple-A Iowa.