Imanaga did not factor into the decision Monday, allowing three runs on two hits, three walks and a hit-by-pitch over six innings against the White Sox. He struck out 10.
Walker went 5-for-9 with two doubles, two runs and a stolen base across both games of Monday's doubleheader split with the Reds.
Pallante allowed four runs on 10 hits and one walk while striking out five batters over six innings in a no-decision against Cincinnati in Game 2 of Monday's doubleheader.
Mathews completed four innings in Game 1 of Monday's doubleheader against Cincinnati, allowing one run on two hits and three walks while striking out seven batters in a no-decision.
O'Brien notched a save in the first game of Monday's doubleheader versus the Reds, striking out all three batters he faced in the ninth inning.
Crow-Armstrong went 4-for-5 with a double, two home runs and three RBI in Monday's 7-5, 10-inning win over the White Sox. He also stole a base.
The Cubs transferred Palencia (elbow) to the 60-day injured list Monday, Vinnie Duber of the Chicago Sun-Times reports.
Shaw (hand) is scheduled to embark on a rehab assignment Wednesday with Triple-A Iowa, Bruce Levine of 670TheScore.com reports.
The Cubs optioned Triantos to Triple-A Iowa on Monday, Taylor McGregor of Marquee Sports Network reports.
The Cubs placed Swanson (oblique) on the 10-day injured list Monday, Taylor McGregor of Marquee Sports Network reports.
