Gene, I pulled my right hamstring about three weeks ago two days before my league (pulled it on a Tues. bowl on Thurs.) and you can definitely expect some discomfort but the pain shouldn't be too severe that it would prevent you from bowling.  Since the fourth step is your "power" step, you can expect some discomfort and maybe a decrease in the amount of power potential coming from that leg (most due to being hesitant and not wanting to feel that pain) but it honestly shouldn't be too bad, at the very least it wasn't too bad for me.

Coincidentally, I just pulled my left hamstring on Monday (playing softball, just as I did with the right one and just as you did Gene) so we'll see how it goes tomorrow at league.  I've been limping around pretty good on it but I know I didn't pull this one as bad as the right.  With the right I heard a pop and felt it crawl up the back of my leg, this one wasn't so bad.  But it is my sliding leg, so we'll see how that goes.

You'll have to let us know how it goes Gene!
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Andrew Loose

1/2 of ABT's Finest

"Strike for show, spare for dough, split for D'OH!"

Geez, Bones. I figured you'd offer a miracle cure or suggest an ointment, not get up in my grill for wanting to tough it out! lol. Seriously though, I'm not going to push through any ridiculous pain thresholds here. If I find during practice that I just can't do it, I won't do it. I'm not trying to be macho. The standings don't mean anything in this league, other than pride, so I'm not worried about not being there. I just enjoy bowling, so I figure there's no real harm in trying. I will probably follow generalsleo's suggestion of starting closer to the line and taking shorter steps. Anyhow, thanks for the suggestions.
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I've only bowled 300, but I've benched 345 : )
 I provide the muscle for the Fellowship of the Saws