Colts QB Andrew Luck out against Jaguars with shoulder injury

Schefter on why Colts held out Luck (1:08)

Adam Schefter explains why the Indianapolis Colts decided to sit QB Andrew Luck, who will miss the first game of his NFL career. (1:08)

Indianapolis Colts quarterback Andrew Luck didn't play Sunday in his team's 16-13 victory over the Jacksonville Jaguars because of a right shoulder injury, missing the first NFL game of his career.

"We worked him out Saturday morning, and we were hopeful he could come in [Sunday] morning, we were going to evaluate him and see how he felt and he just wasn't ready," Colts coach Chuck Pagano said. "Didn't have the arm strength and all that stuff."

Veteran Matt Hasselbeck started in Luck's place and finished 30-of-47 for 282 yards and a touchdown in the victory.

The 40-year-old Hasselbeck became the oldest quarterback to start an NFL game since Brett Favre (41) in 2010, according to ESPN Stats & Information.

"Matt did a great job," Pagano said. "I'm very, very proud of Matt and what he did. The guy is a true pro and a winner. I'm really glad we got him on our football team."

There is no guarantee that Luck will be back for Week 5 because the Colts have a short week. They play at Houston on Thursday.

"He'll workout [Monday], and we'll take it day-to-day," Pagano said.

A source told ESPN NFL Insider Adam Schefter that Luck, who injured his shoulder against the Tennessee Titans in Week 3, had an MRI earlier this week that revealed a bruise.

The fourth-year quarterback had not missed a snap because of an injury in the NFL. The last game Luck missed with an injury was the 2009 Sun Bowl while at Stanford, because of a broken finger.

ESPN NFL Insider Chris Mortensen and Colts reporter Mike Wells contributed to this report.