PHOENIX — Tobias Myers is quite the utility player for the Mets. But unlike other players fitting that description, Myers doesn’t play multiple positions. Instead, he’s a pitcher who has shown the capability to handle various roles. Already this season he had been used as an opener, long reliever and setup man. And then on Friday he got thrust into the closer’s role, working a perfect 10th inning in the team’s 3-1 victory over the Diamondbacks. Myers’ save was the first of his major league career. “It was a cool moment to get my first one and have guys like Craig Kimbrel, Devin Williams and Luke Weaver, guys who have done it in the past, cool to kind of see their reaction and talk to those guys after the game,” Myers said before the Mets faced Arizona on Saturday. He entered the day with a 3.42 ERA in 12 appearances, a trusted reliever in a bullpen that overall has been respectable, but hardly great. The Mets began play with a 3.93 ERA from relievers, which ranked 13th in MLB.…