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9/18/2013 7:03 P.M. ET

Girardi: Yankees know it's must-win time

TORONTO -- Left-hander Andy Pettitte's frustrations were evident after the Yankees' 2-0 loss to the Blue Jays in Tuesday's series opener at Rogers Centre.

The veteran allowed one run -- a solo homer to Toronto's Colby Rasmus -- over 6 2/3 innings but walked away with the loss, his first since Aug. 5. Following the game, Pettitte made it clear that the Yankees need to be playing with a sense of urgency and reel off a winning streak or the club will be in jeopardy of missing the postseason for the first time since 2008. The Yankees sat 3 1/2 games behind American League Wild Card leaders Tampa Bay and Texas entering play Wednesday.

There was plenty of talk in the clubhouse about how every game New York plays for the remainder season is becoming a must-win affair. Manager Joe Girardi echoed those same sentiments again Wednesday.

"You'd have to have your head in the sand not to know, or you just showed up here and you were on a deserted island," Girardi said. "One or the other. If you're not aware of that, then I don't know where you've been."

After wrapping up their three-game set in Toronto, the Yankees will host the Giants and Rays for six games -- New York's final homestand of the season -- before concluding the year with three games in Houston.

Logan reports no issues after bullpen session

TORONTO -- Left-hander Boone Logan, who was diagnosed with a bone spur in his elbow by Dr. James Andrews on Monday, threw a 30-pitch bullpen session at Rogers Centre on Wednesday and came out of it feeling fine.

Logan reported no issues with his elbow and intends to be game ready for Friday's series opener against the Giants. Manager Joe Girardi first wants to see how Logan feels Thursday before clearing him to play, but is optimistic he will get his valuable reliever back.

"My hope is yes," Girardi said. "If he feels good [Thursday], I would say he is a player for us Friday."

Logan told reporters Tuesday that while the bone spur has been bothering him all season, it was something he could pitch through. Andrews reviewed a team MRI and performed a CT scan and informed Logan, who has not pitched since Sept. 6, that he would not do any further damage to his elbow if he continued to throw.

In 60 appearances this season, Logan is 5-2 with a 3.26 ERA. Joel Peralta of the Rays is the only American League reliever who has made more appearances over the last two seasons than Logan's mark of 140.

Murphy gets start behind dish against Jays

TORONTO -- Catcher J.R. Murphy was given the start behind the plate for Wednesday's contest against the Blue Jays, and batted eighth in the Yankees' lineup.

Manager Joe Girardi said he wanted to give Chris Stewart a breather, and with Austin Romine still not fully recovered from a concussion he sustained last week, Murphy was his only option. It marks just the second game that Murphy has started in his Major League career.

"Stew has caught a lot and I'm trying to make sure he doesn't get burned out," Girardi said. "We have a lot of games coming up."

Girardi said Murphy, 22, looks calm behind the plate, has soft hands and has shown no nerves since being called up to the Yankees for his debut Sept. 2.

"It looks like he has an idea of what he wants to do behind the plate with our pitching staff," Girardi said. "I don't see him stabbing at balls, I don't see him jumpy."

Murphy, who hit .269 with 12 homers and 46 RBIs between Double-A Trenton and Triple-A Scranton before his promotion, entered Wednesday's game 2-for-5 in his big league career.

Chris Toman is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.