It's a big day Monday for the Milwaukee Brewers, even though their regular season doesn't begin until Thursday at Cincinnati.

At 4:05 p.m. ET, newcomer Shaun Marcum will take the mound in a split-squad game against San Diego after skipping his last start with a stiff right shoulder.

"I'm ready to go," the former Toronto Blue Jays right-hander told reporters Sunday morning at the Brewers' spring training site in Phoenix. "I threw a bullpen on Friday, threw 35 pitches or so, and everything went great.

"Once I took a couple days off, everything has been back to normal. I'm hoping it's history."

Marcum, who missed the entire 2009 season following elbow ligament replacement (Tommy John) surgery, is expected to throw 65-75 pitches against the Padres Monday before making his Brewers regular-season debut Saturday versus Toronto-born first baseman Joey Votto and the Reds.

Marcum had been dealing with a stiff shoulder off and on early in spring training but hasn't reported any discomfort since exiting a March 17 outing against the Chicago White Sox after three innings.

A year ago, Marcum stepped into the No. 1 starter's role and won 13 games with a 3.64 earned-run average after the Blue Jays traded ace Roy Halladay.

Toronto general manager Alex Anthopoulos dealt Marcum to Milwaukee on Dec. 5 for Canadian infield prospect Brett Lawrie of Langley, B.C., who recently was sent to the Jays' minor league camp after a strong spring training in which the converted second baseman made the switch to third.

Meanwhile, former Kansas City Royals ace Zack Greinke, whom the Brewers also traded for in the off-season, played catch Sunday for a second time since being shut down with a cracked left rib.

Yovani Gallardo, a 14-game winner in 2010, will start Thursday's opener.