The Rockies have placed starting 1B Todd Helton on the 15-day disabled list with a sore back. Helton has played in 81 games for the Rockies this season and he is 79 for 297 (.266 avg, .784 OPS) with 39 runs scored, 7 homers and 29 RBIs. Helton will be replaced in the starting lineup by Jeff Baker. Baker has played in 55 games for the Rockies this season and he is 41 for 152 (.270 avg, .798 OPS) with 27 runs scored, 6 homers and 28 RBIs. The Rockies have recalled 1B Joe Koshansky from AAA to replace Helton on the roster. Koshansky has played in 82 games in AAA ball this season and he is 86 for 306 (.281 avg, .929 OPS) with 51 runs scored, 18 homers and 78 RBIs. But, he has also whiffed an alarming 108 times this season and he could have some problems with major league pitching.