Typically Sport leagues use higher volumes of oil and force you to play straighter or tighter inside due to the lack of "bump room" outside.
Find yourself a medium aggressive ball in your arsenal...something like a Gamebreaker, Special Agent, Cell, Ogre SOlid or similar and try standing 20 and playing up the 10 board. Let the ball reaction tell you where to move.
Ball checks early? grab a less aggressive ball
Ball doesn't corner at all? move right with a more aggressive ball
Light pocket hit? move 2 boards right with the feet and 1 with the mark
Heavy on the headpin? move 2 left with the feet and 1 with the mark
These are not 100% absolutes but rather suggestions as to where to start.
Remember...on Sport conditions straighter is greater!!!!
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Doug Sterner
Doug's Pro Shop
Owego, NY
http://dougsproshop@aol.com
www.dougsproshop.net
Lane 1 Buzzsaw...The Official Power Tool Of Bowling