With a handful of teams off on Monday, there are only seven games on the slate. But there's action from coast to coast, so here are five things to watch for:
• A pair of aces: CLE @ CWS, 8:10 p.m. ET
Two of the top pitchers in baseball square off at U.S. Cellular Field on Monday evening, when Corey Kluber leads the visiting Indians against Chris Sale's White Sox. Kluber was incredible in his last outing, striking out 18 over eight shutout frames against the Cardinals. Sale wasn't too shabby his last time out, either -- giving up two runs on three hits over eight innings and striking out 11.
• McCullers debuts: OAK @ HOU, 8:10 p.m. ET
The Astros' No. 10 prospect will make his Major League debut when he takes on the A's at Minute Maid Park. Lance McCullers went 3-1 with a minuscule 0.62 ERA in six games (four starts) for Double-A Corpus Christi this season. He's given up just 15 hits and two earned runs in 29 innings, while racking up 43 strikeouts to just 11 walks.
• Tigers surging: MIL @ DET, 7:08 p.m. ET
Fresh off a series victory against the National League Central-leading Cardinals, the Tigers return home to face the NL Central cellar dwellers. The Brewers hit an MLB-worst .193 against left-handers, which could certainly work in the favor of Tigers starter Kyle Lobstein.
• Surprise vs. stalwart: STL @ NYM, 7:10 p.m.ET
The Mets have been one of baseball's biggest surprises in the early going this season, rushing out to a first-place start in the NL East. Meanwhile, the Cardinals are back in their usual spot atop the NL Central. They'll be looking to bounce back after a series loss to the Tigers, with John Lackey facing off against Matt Harvey. Harvey is 3-0 with a 3.32 ERA at Citi Field this year.
• Hamels on a roll: PHI @ COL, 8:40 p.m. ET
After some early-season struggles, Phillies left-hander Cole Hamels has gotten things on track in his last two outings by surrendering just three innings in the two seven-inning starts combined. He'll be up against Jordan Lyles, who had his last start cut short after he was struck on the right hand by an Albert Pujols line drive.
Joey Nowak is a reporter for MLB.com. Follow him on Twitter at @joeynowak. This story was not subject to the approval of Major League Baseball or its clubs.