Next thing he knew, he was packing up, and he, his girlfriend and his dog were driving to Pittsburgh. He met some of his new teammates Sunday night and practiced with them for the first time Monday at UPMC Lemieux Sports Complex.
Suddenly he's the third-line center on the two-time defending Stanley Cup champions, skating between Carl Hagelin and Patric Hornqvist, doing battle drills against Crosby and Evgeni Malkin.
"I was in awe," Sheahan said. "I've never seen them up that close, other than playing [against them]. You don't get to see their true, true work ethic. It comes out in practice, and it was amazing."
This is what Sheahan needed, and maybe what the Penguins needed too.
Sheahan is better than he looked the last season-plus in Detroit. He was a first-round pick (No. 21) in the 2010 NHL Draft. He scored nine goals in 42 games for the Red Wings in 2013-14, 13 in 79 games for them in 2014-15 and 14 in 81 games for them in 2015-16.
His funk last season was extraordinary. He failed to score on 106 shots in his first 79 games. One hundred six shots. Had he failed to score in the finale, he would have become the first forward in NHL history with no goals and at least 100 shots in a season.
It's hard to say he didn't have opportunity. He averaged 1:07 on the power play. But he couldn't get a bounce, and bad luck spiraled into self-doubt, and kept spiraling and spiraling. He was behind Henrik Zetterberg, Dylan Larkin and Frans Nielsen on the depth chart at even strength.
"It's tough to leave those guys," said Sheahan, who spent more than five seasons in the Red Wings organization. "But I think from a hockey standpoint, I needed a change of scenery. Things weren't really working out there."
The Penguins needed a third-line center after Nick Bonino signed a four-year, $16.4 million contract with the Nashville Predators as a free agent July 1.