Ubaldo at Home

Ubaldo Jimenez of the Colorado Rockies owns an ERA of 6.24 at home this season.  That's nearly double his home ERA of the three previous seasons, 3.28.  One reason for that change comes from the number of home runs he allowed.  Have gave up a combined 19 at home in the three previous seasons, and seven so far this year.  Most of Ubaldo's home runs come off the fastball and the righty is having problems getting the pitch down at Coors this season:

Ubaldo Jimenez, pitch frequency on fastballs, 2008-2011.During his time, 13 of his fastballs resulted in home runs of 3104 pitches, or a home run every 238 fastballs. In terms of levels, 1251 (40.3%) of these pitches were high, 1009 (32.5%) in the middle, and 844 (27.2%) low.  Ten of the 13 homers on his fastball came on pitches in the middle.

Ubaldo Jimenez, pitch frequency on fastballs, 2011.Four of his home runs came on 403 fastballs his season, one every 100 pitches.  Ubaldo threw 179 (44.4%) up, 132 (32.8%) in the middle, and  92 (22.8%) down.  Batters can concentrate on the upper two-third of the plate, and that's where the home runs come against Jimenez.