We’re rolling out a new feature in 2009 by introducing the Baseball America weekly prospect injury report. Every Wednesday, we’ll track down prospect injuries for you, letting you know who’s hurt, how they got hurt, how much time they will miss and who’s coming back from the disabled list. For spring training and offseason injury notes, check out our organizational roster previews.

Aaron Cunningham, of, Athletics: Oakland’s top positional prospect is on the disabled list after separating his shoulder on Sunday in a home-plate collision with Triple-A Tacoma (Mariners) catcher Jeff Clement. The A’s say that Cunningham, who turns 23 next week, could return to the field in a couple of weeks, though at this point that’s more of an educated guess depending on the severity of the damage to his shoulder.

Bryan Morris, rhp, Pirates: BA correspondent John Perrotto tells us that the Pirates have placed Morris on the disabled list with shoulder inflammation. The Pittsburgh Post-Gazette expects Morris to miss four to six weeks with "significantly restricted range of motion" in his shoulder. Morris’ career has been sidetracked by injuries since he signed with the Dodgers as a first-round pick out of Motlow State (Tenn.) CC in 2006. He missed the entire 2007 season to have Tommy John surgery, then returned to the low Class A Midwest League to pitch 81 2/3 innings before the Dodgers sent him to the Pirates in the three-way deal that sent Manny Ramirez to the Dodgers and Jason Bay to the Red Sox. Morris threw 14 1/3 innings last year for the Pirates before the team shut him down when Morris felt pain in his shoulder.

Logan Morrison, 1b, Marlins: Morrison will miss the next six to eight weeks with a small fracture in his right wrist, according to BA correspondent Mike Berardino. Morrison, who is with Double-A Jacksonville, is the highest-ranked prospect to come down with a significant injury early in the 2009 season.

Carlos Triunfel, ss/2b, Mariners: Triunfel is out indefinitely with what sounds like a a fairly serious left leg injury that’s being reported as a broken left fibula. Seattle manager Don Wakamatsu told the Seattle P-I that Triunfel will undergo surgery today:

"We’re not sure how severe the injury is, but it’s a tough thing for the kid," Wakamatsu said. "He’s a great player. We’ll see what happens in surgery to see how much of the season he’ll miss. We won’t know the severity until the surgery. We have our fingers crossed."

Daryl Jones, of, Cardinals: Jones was hit in the head by a pitch in Sunday’s game between Double-A Springfield and Midland. The pitch knocked Jones to the ground and he was removed from the game. Jones sat out games on Monday and Tuesday, though he is expected to return to action soon.

Quick Hits: Cubs third baseman Josh Vitters missed Saturday’s game for low Class A Peoria with a lower back strain, Peoria manager Marty Pevey told the Peoria Journal Star. . . Indians outfielder Matt LaPorta left Triple-A Columbus’ game on Saturday with a strained right ribcage, according to the Columbus Dispatch. LaPorta sat out Sunday’s game, but returned to action on Monday.