Wouldn’t it be strange if Billy Hamilton’s last act as a New York Met was a baserunning gaffe? The Taylorsville High product, who has made his living with his legs, was betrayed by his aggressiveness on Thursday, getting thrown out trying to steal third base with no outs in the bottom of the ninth and his team down a run. Hamilton was designated for assignment Friday, a move the Mets said was needed to add another pitcher to the active roster. But manager Luis Rojas also called Hamilton’s mistake on Thursday “not good baseball.” Hamilton, used mainly as a pinch runner and defensive replacement, was 1-for-22 at the plate this season and had three steals in four tries. He has 302 career steals, having been successful more than 80 percent of the time. But he has never gotten on base at a good rate. He has bounced from Kansas City to Atlanta to San Francisco to the Mets the last two seasons. Can he bounce back to the big leagues?