I was actually curious about how less frequently Reyes attempted steals after coming back from his injury. I don't necessarily buy this argument of "losing a step" but I thought it would be interesting to see how much he was possibly taking it easy on his leg.
I decided to look at the rate at which he attempted steals. To do this properly, I would have to not only count the number of times a player gets on base, but also how many times he advanced a base (e.g., he would have two opportunities if he singled, then the next batter walked), and I would also have to consider the situation. Since I don't want to go through the box score of every game he's played (I'm bored, but not that bored), I'm just going to do this the dumb way, and count up the number of times he reached base, not including home runs and call that the chances. Then I'll add up stolen bases and caught stealing, which will give me the attempts. By dividing the attempts by the chances, we get an attempt rate.
So, SBA% = (SB + CS) / (H + BB + HBP + ROE - HR)
The left panel is his SBA% since 2005. His 2013 numbers only include his 83 games after he returned (there's only a 0.02 change). The right panel is the month-by-month breakdown of 2013. Since he only played five games in June, I lumped that in with July. While the (binomial) errors are pretty large, you can see that in the ~30 games right after coming back, he was back to roughly the SBA% as he had for 2010 through 2012. The next two months, he attempted fewer and fewer SBs, which I'd attribute to him taking it easy, especially since the team was utterly and completely out of contention. Granted, you could just as easily draw a straight horizontal line through the last three points and say that, within the noise, it's likely his attempt rate was pretty constant.