Year-Over-Year Improvements In The Boys' Sprints

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How did Pennsylvania boys sprinters improve from last season to this season?

We analyzed the data -- 5,000 deep in each event -- to determine each athlete's improvement or regression from 2017 to 2018. Many boys showed some big improvements, like Mechanicsburg's Joseph Bruno, who saw a big drop in time in the 100, 200, and 400 meters.

The lists only include athletes who have registered times in 2017 and 2018 in the particular event.

The lists are sorted with the top improvements in each event at the top. Check out lists in the sprint events -- 100, 200, and 400 -- below.