Curently in First, do I tweak or stand pat?

[TigersFan80]

I have yet to lose a head to head matchup and currently have a lead of 15 games, but I am a tinkerer and am always looking to improve. Do I tweak or stand pat? Trade pitching for OF help?

10 Owner League
C - Victor Martinez
1b - Justin Morneau
2b - Julio Lugo
SS - Derek Jeter
3b - Alex Rodriguez
OF - Carl Crawford, Alex Rios, Gary Matthews Jr
Util - Geoff Jenkins, Dan johnson
Bench - Jim Thome

SP - Braden Looper
Brad Penny
Aaron Harang
Curt Schilling
Greg Maddux

RP - Takashi Saito
Franky Rodriguez
John Broxton
AJ Burnett
Hideki Okajima

Currently bench pitchers (updated daily)
Al Reyes
Mariano Rivera
Bartolo Colon
Rich Harden
Roger Clemens

Custom League URL: http://baseball.fantasysports.yahoo.com/league/ironprod
Max Teams: 10
Scoring Type: Head-to-Head
Min Innings Pitched: 23
Roster Positions: C, 1B, 2B, 3B, SS, OF, OF, OF, Util, Util, SP, SP, SP, SP, SP, RP, RP, RP, P, P, BN, BN, BN, BN, BN, BN
Stat Categories: R, H, 1B, 2B, 3B, HR, RBI, SB, BB, K, AVG, W, L, CG, SHO, SV, BB, K, HLD, ERA, WHIP

[TigersFan80]

/bump