Flexen, who arrived at Petco Park in San Diego (by way of Binghamton), will make his major league debut against the Padres.
“I don’t think it will be too difficult,” Flexen told the New York media. “The hardest thing is to manage the emotions. Like he [Terry Collins] said, ‘Whatever got me here, stick with it.’ That’s been being confident, attacking guys and that’s what I am going to go out and do. Just stick to the game plan.”