RESEARCH: Does it matter where runners are stranded?

The concept of strand rate (S%), or the amount of baserunners a pitcher allows that don’t score, was first devised at BaseballHQ.com by Ron Shandler many years ago. FanGraphs uses a slightly different statistic (LOB%, originally developed at The Hardball Times), but no matter how you calculate it, leaving runners on base is more luck than skill: players that significantly deviate from the league average in S% or LOB% should expect to see their numbers more towards the league average in the future.

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  For more information about the terms used in this article, see our Glossary Primer.