The Baltimore Orioles place lefty reliever Jamie Walker on the 15-day disabled list with left elbow inflammation. Walker has pitched in 37 games (0 starts) for the Orioles this season and he is 1-0 with a 4.98 ERA and a 1.62 WHIP. The Orioles have activated lefty Adam Loewen from the D.L. and he will replace Walker in the bullpen. Loewen has started 4 games for the Orioles this season and he is 0-1 with a 7.85 ERA and a 1.91 WHIP. Loewen will need to focus better as a relief pitcher as every mistake is magnified. He has allowed 5 homers and walked 15 batters in only 18.1 innings this season for the Orioles and he will need to do much better than that the rest of the way if he wants to stay in the majors.