The Lenny Dykestras?
The Civil Service Office Workers
(they don’t do dick)
Hooked On Sapphonics
Wicked Curves
Dyke Zone
Designated Clitters
No Sac Flies!
The Ball-Bashers
Does the team perform a cunning array of stunts? 
For whatever reason, this one just tickles my funny bone to an unreasonable degree.
One of my friends is on a gay softball team sponsored by Prudential. The team name? The Prudes.
Heh! I like “No Sac Flies”.
“Clitters” might be a bit too much for the t-shirts though. While smut is highly encouraged, they play in the park where there are kids, and one year one of the teams didn’t like going out for a post-game beer because they weren’t comfortable with their team logo (and yet the team voted on the name).
I like “No Yankees” too. It makes me giggle like a sixth grader. 
No Baby-Batters
The Saph-rifice Flies
The Y-Nots
The Toklas Brownies
Erm… We Don’t Want a Catcher?
Not specifically lesbian, but one of the inremural teams I knew had an arguably appropriate name:
** The Master Batters**
Vagitarians
Good Vibrations
GIDED-Ground Into Double-Ended Dildo
No Balls, 10(+?) Dikes, All Out
Designated Lickers
Cycle Hitters
Wet, but not Juiced
Get Dirty
Toronto Fur Traders
No B.J.'s(Ryan) to Close
Roger’s Her Centere
…okay, I’m stretching it now; too much fun though…
Lipstick leftfielders.
Well adjusted. (watch the pros sometime, you’ll know what I’m talking about)
A Bunch of Baseball Playing Lesbians.
The **Non-Walkers ** or the Strike-Out Lovers
because they never get balls!
Rainbow Sox
Squeezeplay
Beaver Receivers
Batgirlz
Chin Music
Catchin’ Curves
Doubleheaders
Hitstick Lesbians
The Last Licks.