Spot start a SP today or keep Pierre in the lineup?

[Tom Emanski AllStars]

The other owner doesn't have a SP starting today and only 2 RP
I can either leave Juan Pierre in the lineup and hope he gets some SB
or
drop Pierre and pickup (spot start) a SP to protect my W and K, in case his relievers have a big day

10 team - H2H- 6x6 - nonkeeper - daily changes - max adds per week = 3
(R,HR,RBI,AVG,OBP,SB --- W,QS, SV,K,ERA,WHIP)

C-Buster Posey (c/1b)
1B-Albert Pujols (1b)
2B-Rickie Weeks (2b)
3B-Evan Longoria (3b)
SS-Alexei Rameriz (ss)
OF-Andre Ethier (of)
OF-Carlos Quentin (of)
OF-Jason Werth (of)
Util-Joey Votto (1b)
BN-David Ortiz (1b)
BN-Juan Pierre (of)

SP-Jorge De La Rosa
SP-John Lester
RP-Carlos Marmol
RP-Octavio Dotel
P-John Axford
P-Matt Garza
P-Francisco Liriano
BN-Clay Buchholz DL
BN-Max Scherzer
BN-Ryan Dempster
DL-Yovani Gallardo