Blalock not starting, should i trade him?

[Happy Homer]

I've noticed that lately Blalock has been sitting out in favor of Teixeira against LHP. Shoud I hold onto Blalock as he has been a stud all season long and is it worth the trouble of switching lineups everyday to keep up with his playing time? I'm thinkin alternate with Stewart when he sits. Two people in my league with Halladay and Mussina are interested in Blalock and are willing to trade them in a package. Lemme know what you think, thanks.

C - Toby Hall
1B - Todd Helton
2B - Mark Ellis
3B - Troy Glaus
SS - Miguel Tejada
OF - Barry Bonds
OF - Vernon Wells
OF - Pat Burrell
Util - Jeff Bagwell
Util - Hank Blalock
Bench - Shannon Stewart
Bench - Junior Spivey
Bench - Torii Hunter

-----------------------------------------------------

SP - Kerry Wood
SP - Kevin Millwood
SP - Randy Wolf
RP - Scott Williamson
RP - Biddle
P - Kevin Brown
p - Kyle Lohse
Bench - Tim Wakefield