I understand the theory about the neoprene, but depending on the severity of the pull...a calmer solution of simple compression shorts may do the trick just as well.  Not the expense of a neoprene short and basically what you are trying to accomplish is support and warmth...which compression shorts were made for.  The one's I use I pick up at Dick's Sporting Goods for about $10/pair.  Just my .02.

Second amen for Compression shorts.  I'd taken 3 months off from bowling due to change in schedule at work, then when a charity tournament opp came up, I had 2 weeks to get ready.  Even though I stretched before what was to be a normal practice session of 8 games, later that day I realized that if I had the opportunity, I shoulda done a 3 or 4 game block over a couple of days.

Took an old pair of compression shorts I hadn't used in almost a decade, which were one size too small -- which made for a totally different set of distractions while bowling, and did rather well with not near the pain that I had been having.  Of course, I also had taken 3 Alleve an hour or two before bowling in the tourney, so that helped also.