Drew Pomeranz, the former first-round draft pick out of Ole Miss, is set for his 2012 major league debut on Sunday.

Pomeranz threw four shutout innings on Tuesday in a tuneup for his first major-league start of the season. He gave up four hits, struck out four and walked one in his start for the Double-A Tulsa Drillers. His team went on to beat Corpus Christi 6-3.

Read more about that game here and here.

“I was just trying to go out there and get that first one going,” Pomeranz told Milb.com. “I felt pretty good, maybe a little over-pumped up for that first game.”

Pomeranz also got a base hit in the game, going 1 for 2.

The left-hander, the No. 5 overall pick in 2010, will start Sunday for the Colorado Rockies against the Arizona Diamondbacks. He was traded from Cleveland to Colorado last summer.

His manager, Jim Tracy, says the team will limit the total innings for Pomeranz this season, after he threw only 118 pro innings last summer. Read here.