HARTFORD — Craig Breslow is 37 years old, with a dozen years of experience as a left-handed reliever in the major leagues. He is pitching now for the Class AA New Hampshire Fisher Cats, just getting to know his teammates. In their opening series here, at Dunkin’ Donuts Park against the Hartford Yard Goats, third baseman Vladimir Guerrero Jr. amazed him.

“Last night Vlad made a throw across the diamond, and I was like, ‘I didn’t realize he had that arm!’” Breslow said. “And then I thought: ‘I kind of should have. Why wouldn’t he?’ His dad could do it all.”

Reminders of familiar greatness run deep in the infield of the Fisher Cats, an affiliate of the Toronto Blue Jays. On a recent Saturday night, Cavan Biggio led off and played second base, with shortstop Bo Bichette hitting second and Guerrero, the third baseman, batting third. All three doubled by the fifth inning, just as their fathers did 1,546 times across a combined 50 seasons in the majors.

Craig Biggio, Dante Bichette and Vladimir Guerrero Sr. made 20 All-Star teams and belted more than 1,000 home runs among their 7, 500 or so hits. Biggio made the Hall of Fame in 2015, and Guerrero will be inducted in July. Sons of major leaguers often play pro ball, but three on one team, with fathers who were so prominent, is a special treat in the Eastern League.