What does MSW stand for in a book on University of Michigan sports?

2018-07-05 19:43:45

I am researching a relative whose name appears in the book Michigan: Champions of the West. Much of the book consists of names, abbreviations, and years. Here is an excerpt:

Bailey, Debi VB 1986

Bailey, Donald A. FB 1964,65,66

Bailey, Eric R. MSW 1989,90,91,92

I can imagine FB standing for football or fullback. What does MSW stand for?

Other abbreviations are SB, IHO, MTN, MBK, and MTR.