"He said, 'We thought you had a good first half of the season and can help the Olympic team,' " said Callahan, 24. "To say I was excited is putting it mildly."
The first call was to his parents back home, the Rochester native said, "to tell them they'd be making a trip to Vancouver."
Callahan, who will play in his first Winter Games, and Rangers captain Chris Drury, who skated for the United States in 2002 and 2006, were among the 23 players named to Team USA on Friday for the Olympics in February.
"It's been a great week," said Drury, whose wife, Rory, gave birth to their third child and second daughter, Kelly, on Tuesday night.
As for the Games, "just based on age, it's three different circumstances," said Drury, 33. He was one of the youngest players in Salt Lake City in 2002, in the middle in '06 (when the team won a silver medal) and "one of the oldest" now, he noted.
Drury certainly will know what to expect. "You basically get off the plane and be ready to play," he said. "And I remember coming back and playing better just having been there with all those world-class players."
That's what he expects to happen with Callahan. "We're all thrilled for him,'' Drury said. "What he does, night in and night out, first PK, first PP, hits everything, blocks shots, just an all-around player, and this will just raise his game."
Callahan, who has 19 points, was chosen as the Rangers' alternate captain in his fourth season. He has five goals and six assists in the last 13 games.
Drury, who missed five games with a concussion suffered Nov. 7, has five goals and nine assists in 35 games but excels on faceoffs and penalty-killing.
The value of Drury and Callahan, said coach John Tortorella, who will be an assistant coach for Team USA, is their ability to be deployed "in every offensive and defensive situation.''
"That was my conversation with Ronnie [Wilson, the U.S. head coach],'' Tortorella said. "Dru is the consummate pro and for Cally, it's a step in the right direction. If we [the NHL] stay in the Olympics, he could be on the team for quite a while."
Callahan, who had 22 goals and 40 points last season and ranked fourth in the NHL with 265 hits, recalled watching "the energy and pride" on TV in 2006. Later, he spoke with another Rochester native, then-Devil Brian Gionta, about his experiences.
This February, though, Callahan said, "I couldn't have picked a better person to go with than Dru. He's been a mentor for me."
2010 U.S. Olympic Men's Ice Hockey Team