Haren threw a bullpen session at Wrigley Field on Friday, MLB.com's Ken Gurnick reports. Haren is now in a routine that would set him up to pitch a big game Monday against the Giants. Hyun-Jin Ryu (shoulder) was previously tossed around as a potential candidate to make that Monday start, but Don Mattingly called that notion "a stretch" on Thursday. With Ryu likely out of the mix, Haren is now set to take the hill in what could be a deciding game in the final NL West standings. Although Haren was touched up for five earned runs his last time out in Colorado, he had allowed just two earned runs over his previous four starts combined.