For playing essentially half of a season in 2010, Rollins had averages that were about equal to his annual averages in other years. However, as previously mentioned, he showed improvements in the number of walks he could draw and the stikeouts he would have. In addition to those two improvements, Rollins also showed great improvements with his averages with runners in scoring positions.
Rollins' career average with RISP is .290 with an OBP of .373 and a slugging percentage of .488. With two outs, those averages are .267, .392, and .455, respectively. There are actually very good numbers already, but his 2010 numbers were great improvements above his overall averages. His overall averages for those categories in 2010 were .329, .405, and .557, respectively. With two outs in 2010, 3,75, 4.79, and .700, respectively.
The only other year that Rollins had where those numbers can compare to another was the 2008 season where those averages were .318, .449, and .514 and .295, .492, and .477 with two outs.
To translate all of this, when there were two outs with runners in scoring position and Rollins was at the plate, he got on base almost 1 in every 2 times. Those are great numbers, and I expect Rollins to produce similar averages for 2011.