Sixty years ago, they made a baseball movie called “It Happens Every Spring.” The plot is a fantasy, about a chemist who accidentally discovers a formula that repels wood and then becomes a pitcher who puts his potion to work for fun and profit. And, no, they didn’t test for the potion back then (or HGH, for that matter).
It happens every spring. There is no evidence that Jimmy Rollins has ever seen the movie, but he clearly knows the effects it describes. Pretty much every season he has been in the major leagues, Rollins has endured a long slump in the first half of the season. (There are a couple in the middle of the season, too.) At least one of them was worse than what Rollins had done so far this year, but there really have been a bunch of them.
It is why there no reason to worry yet.
Spend a half-hour with a strong cup of coffee and baseball-reference.com and you can do the same thing. It is a Rollins trait, these slumps. I tried to pick out time periods that approximate the 131 plate appearances that Rollins has had so far this season.