Bonino took a pretty feed from the corner by Kris Letang and beat Martin Jones from in close with 2:33 remaining to lift the Penguins to a 3-2 victory over the San Jose Sharks in Game 1 on Monday night.
Rookies Bryan Rust and Conor Sheary staked Pittsburgh to an early two-goal lead before the Sharks tied it in the second period on goals by Tomas Hertl and Patrick Marleau. The Penguins responded by upping the pressure in the final period and it paid off with Bonino's fourth goal of the playoffs after he darted to the San Jose net in time to knuckle Letang's pass by Jones for the winner.
Game 2 is Wednesday night in Pittsburgh.
PHOTOS: San Jose Sharks fans celebrate historic season
Matt Murray finished with 24 saves for Pittsburgh, which began its bid for the fourth title in franchise history by peppering Jones constantly in the first and final periods. Jones made 38 stops but couldn't get his blocker on Bonino's wrist shot. The Penguins threw 41 shots at Jones, well over the 28 he faced on average during San Jose's playoff run.
The Sharks made it to the first Stanley Cup Final in franchise history by rebuilding themselves on the fly. Two years removed from a brutal collapse from a 3-0 series lead in the first round against Los Angeles, San Jose ended a 9,005 day wait to play in the NHL's championship round by relying on a tough, aggressive style that squeezes opponents with a relentless forecheck while limiting chances in front of Jones.
Yet veterans Marleau and Joe Thornton - the top two picks in the 1997 draft held in Pittsburgh who had waited nearly two decades to make it to the league's biggest stage - insisted the Sharks were hardly satisfied after dispatching St. Louis in a cathartic Western Conference finals.
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Maybe, but the Sharks looked a step slow - maybe two steps slow - while searching for their footing against the Penguins, who rallied from a 3-2 deficit to edge the Tampa Bay Lightning in seven games to advance to their first Cup Final since 2009.
Rust, who surprisingly made the team out of training camp and became an unlikely playoff star by scoring both of Pittsburgh's goals in Game 7 against the Lightning, gave the Penguins the lead 12:46 into the first when he slammed home a rebound off a Justin Schultz shot for his sixth of the postseason, a franchise record for playoff goals by a rookie.
Less than a minute later Sheary, who didn't become a regular until the middle of January, made it 2-0 when Sidney Crosby whipped a blind backhand cross-ice pass to Sheary's stick. The rookie's wrist shot from the right circle zipped by Jones and the Penguins appeared to be in complete command by overwhelming the Sharks in a way few have in months.
San Jose and its group of Cup newcomers regained its composure in the intermission and responded with a big surge. Hertl jammed a shot from just outside the crease between Murray's legs on the power play 3:02 into the second to give the Sharks momentum. Late in the second, Marleau collected a rebound off a Brent Burns one-timer behind the Pittsburgh net and then beat Murray on a wraparound to the far post that caromed off Murray's extended right leg and into the net.
Meanwhile, it wasn't a home game but it sure felt like one at the Shark Tank. Thousands of Sharks fans converged at the SAP Center for Game 1 where the team hosted an official viewing party.
Fans says it was the next best thing to being in Pittsburgh.
"I want to hear them. I want my fellow fans, I want to yell with them and scream with them!" said Jason Frey, a Sharks fan.
"It took 25 years and we're here and they're looking good so far," said Jim Barten, despite the team's loss.
And it wasn't just San Jose that was awash in teal.
"We've been going to games since before I could say the alphabet. It means the world to be here," said Niall Cooper, who made the trip to Pittsburgh.
But the Game 1 loss wasn't enough to discourage the Sharks faithful.
"I am proud of how we fought back. Not well enough to win, but we take Game 2!" said Sharks fan Jack Ryan in Pittsburgh.
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First #StanleyCup Final goal in franchise history is scored by Tomas Hertl. :-))— San Jose Sharks (@SanJoseSharks) May 31, 2016