PITTSBURGH — Sidney Crosby danced through the neutral zone, slipped across the New York Rangers’ blue line and waited for help. It arrived in the form of a blurring No. 43 black-and-gold jersey, the one worn by a player whose speed and relentlessness propelled him from prospect to unlikely catalyst for a Stanley Cup contender in all of five months.

On the surface, it would seem impossible that Conor Sheary would call for a pass from one of the best players in the world and deliver a sizzling wrist shot that sailed over Henrik Lundqvist’s glove and into the top corner of the net to help the Pittsburgh Penguins exorcise two years of postseason misery, which is just what the 23-year-old did in Saturday’s playoff series-clinching 6-3 victory.

Barely two years removed from a solid if not spectacular college career at Massachusetts, Sheary now finds himself playing alongside Crosby and Patric Hornqvist on the top line of a team heading into the Eastern Conference semifinals with some serious momentum after vanquishing the Rangers in five mostly one-sided games.

It’s not quite the way Sheary figured his season would end when he began it playing for Pittsburgh’s minor-league affiliate across the state in Wilkes-Barre/Scranton last fall. Yet dig a little deeper and really, Sheary thinks it kind of makes sense.

“They’re easy guys to play with,” Sheary said. “They’re smart with the puck and they’re smart defensively. When you get the puck in the offensive zone, they make plays. It’s fun to play with them and obviously we have chemistry right now.”

The kind that is coalescing up and down Pittsburgh’s revamped roster. The team that will face Washington in the second round this week hardly looks like the one that bowed out so meekly a year ago. For proof, look at the score sheet from Game 5’s rout of the Rangers. All five goal scorers for Pittsburgh — Sheary, Bryan Rust, Phil Kessel, Matt Cullen and Carl Hagelin — were playing elsewhere last spring. Now they’re symbols of the on-the-fly makeover put together by general manager Jim Rutherford and implemented by head coach Mike Sullivan.

“We went through a lot of adversity throughout the year with a tough start, injuries throughout the entire year,” Crosby said. “We learned a lot about this group along the way.”

Including that it needed fresh legs to complement Crosby and Evgeni Malkin, talented but occasionally mercurial superstars whom the Penguins have struggled at times to surround with the right parts. For the moment, that problem appears to be solved. Sheary fit right in with Crosby, making up for in sheer tenacity what the rookie lacks in experience.

Sheary kickstarted Pittsburgh’s victory in Game 1.