Need advice on how to stay in first!!!

[Crazy Wolf]

Currently, im in first place in my yahoo, 12 team, head to head league. I had a huge lead a few weeks ago but the 2nd place team is creeping up. I got extremely lucky during the draft with pitchers. In the later rounds i drafted hamels, haren and maine! Should I sell high on any players and if so who should I trade for?

Heres my roster...

C: Russell Martin
1B: Prince Fielder
2B: Chase Utley
3B: David Wright
SS: Hanley Ramirez
OF: Magglio Ordonez
OF: Grady Sizemore
OF: Matt Holliday
Utility: Curtis Granderson

SP: Brad Penny
SP: John Lackey
SP: John Maine
SP: James Shields
SP: C.C. Sabathia
SP: Dan Haren
SP: Cole Hamels
RP: Jose Valverde
RP: Takashi Saito
RP: Jonathan Papelbon

[Whisp]

magglio, penny, haren might be sell-highs