When the situation presented itself for Carlo Colaiacovo, it was a no-brainer for the veteran defenseman to go back to familiar territory.

Colaiacovo, 30, was on the ice for the morning skate Thursday with the St. Louis Blues after settling immigration paperwork, passing his physical and then making his one-year, $550,000 one-way contract official. Colaiacovo played for the Blues from 2008-12 after being acquired from the Toronto Maple Leafs along with Alexander Steen for Lee Stempniak.

Jordan Leopold is sidelined two months with ligament damage to his right index finger, so the Blues felt compelled to bring in a veteran presence and one that they were familiar with rather than go with a younger American Hockey League player to fill the void as a seventh defenseman.

When things intensified Monday, Colaiacovo didn't waste any time deciding what to do.

"It was just ironic. I took some time off this year to be with my wife, we’re expecting our first child this year, so I thought it was important for me to be around her during that time," said Colaiacovo, who spent last season playing for the Detroit Red Wings. "Then a couple of weeks ago, me and my agent, I gave him the go-ahead to start finding me some teams to play. We were in talks with a few teams and then out of the blue, we get a phone call from St. Louis and I just put everything on hold because the opportunity that presented itself seemed too good to be true.

"Me and my wife and my family really enjoyed our time here, and it was an easy decision for me to come back. Regardless of the opportunities that were presented to myself with the other teams, my goal is to be part of a winning team and there was no better scenario to put myself in than to come back here and be part of a team that’s competing for a Stanley Cup. To me, it was a no-brainer and I'm glad we got it done."

Colaiacovo, who will wear No. 13 -- Ian Cole wears Colaiacovo's previous number (28) for the Blues now -- said there are no expectations. He's simply here to do what's necessary after the Red Wings bought out the final year of his contract over the summer.

"I'm not putting any expectations on myself, other than coming in here and being part of a great team and doing whatever is asked of me," Colaiacovo said. "I'm here to be part of the group, I'm here to contribute in any way possible. I'm confident in myself that when given the opportunity, I can contribute in any way that's asked, and that's all that I'm going to ask from myself.