David Peterson allowed two runs and struck out eight batters over six innings in a no-decision against the Mariners on Saturday.

Peterson surrendered a leadoff homer to Randy Arozarena in the first inning. He settled in for three scoreless innings before giving up one more run in the fifth on a bases-loaded groundout. Peterson would give the Cubs one more scoreless frame, ending his day after six innings with eight strikeouts. The 30-year-old left-hander will take a 5.17 ERA, 1.50 WHIP, and a 103/49 K/BB ratio across 118 1/3 innings into a start against the Reds in Chicago on Friday.