Fezz has been saying this for years and it never seemed right to me, it sounds like an old wives tale. If strength training makes shooting worse (free throw shooting in particular?) and our players put on weight and get stronger every year, shouldn't we expect FT% to go down as our players stay in the program longer?
To test this hypothesis I looked at the FT% for every Mooney recruited player in their first year playing under Mooney (where they took at least 30 FT attempts) and their last full year under Mooney. If their FT% increased by more than 3% I marked them down as improving their FT%, if it decreased by more than 3% I marked them down as getting worse, and if it was within ±3% I marked them down as staying the same.
Increased (13/22, 59%):
KF, TJC, TA, ANO, MW, Ced, Brothers, Greg Robbins, Garrett, FCM, Harper, Gonzo, Butler
Same (5/22, 23%):
JJ, DT, K0, DWill, Kevin Smith
Decreased (4/22, 18%):
SDJ, TD, KA, Geroit
Over half of players under Mooney improve their FT% as they train in our program, and most of the players who don't improve at least maintain the same FT%. Fezz's theory is not supported at all by the actual performance of players, at least on our team.