As the first week of major league action winds down, we're starting to see many of the prospects who made big league rosters take their turns on the field.
- Michael Pineda made his first major league start on Tuesday, and the Mariners were pleased with the results, says Geoff Baker of The Seattle Times. Pineda was one of a number of surprise prospects to stay in the majors after the spring, notes Keith Law of ESPN.com, who questioned the M's decision to keep the young right-hander.
- The Los Angeles Angels of Anaheim have elevated hard-throwing rookie Jordan Walden into the closer's role at the back of the bullpen after incumbent Fernando Rodney's early season struggles, reports Kevin Baxter of The Los Angeles Times, who also notes the successful relationship rookie catcher Hank Conger has molded with team ace Jared Weaver. Conger caught Weaver in two late-season starts in 2010 and Weaver praised the prospect's work behind the plate. Conger made his first start on Tuesday, receiving another Weaver gem, and perhaps adding to the confidence manager Mike Scioscia has in him behind the plate.
- Brandon Belt has struggled at the plate to start the season, and Aubrey Huff has been an adventure in right field, where he's playing to accommodate Belt's arrival in the lineup, but despite these struggles, Giants manager Bruce Bochy says he has no intention of sitting Belt down anytime soon, says Henry Schulman of the San Francisco Chronicle.
- Mike Minor will make his first start of the season for the Braves on Wednesday, taking the rotation spot of the injured Jair Jurrjens, says Doug Miller of MLB.com. Minor will try to get the ball to Craig Kimbrel, the Braves closer who has continued his string of dominance from last season, notes Mark Bowman of MLB.com.
- Jeremy Hellickson will make his 2011 debut for the Rays, getting the start opposite Dan Haren against the Angels on Wednesday, says Spencer Fordin of MLB.com.
- The Washington Nationals plan to move rookie second baseman Danny Espinosa up to the leadoff spot in their batting order, reports Bill Ladson of MLB.com.

