The A’s have placed 31-year old lefty swinging outfielder Matt Watson on the 15-day disabled list with kidney stones. Watson has played in 12 games for the A’s this year and he is 6 of 30 (.200 avg, .639 OPS) with 2 runs scored, 1 homer and 4 RBIs. The A’s have recalled 23-year old righty swinging 1B/OF Chris Carter to replace him on the active roster. Carter was the A’s #1 prospect coming into this season according to Baseball America. Carter made his major league debut for the A’s last night and he was 0 for 3 with 2 whiffs. Carter played in 113 games in AAA-ball this year and he was 111 of 424 (.262 avg, .898 OPS) with 84 runs scored, 27 homers and 89 RBIs. He has now played in 661 games in his six years in the minors and he is 704 of 2,471 (.285 avg, .921 OPS) with 458 runs scored, 145 homers, 502 RBIs and 27 stolen bases. The A’s really hope that Carter is ready for the show because they need his power.