"I think so," Mattingly said. "He's durable, he takes the ball, he's a good teammate. If he keeps the ball down, he's filthy. But last year he didn't keep the ball down on a consistent basis."
Troncoso was designated for assignment on Thursday to make room on the 40-man roster for Ronald Belisario, who was required to be moved off the restricted list that day, 30 days after he reported to camp. Belisario still must serve a 25-game suspension at the start of the season.
"We knew Belie had to go onto the 40-man and somebody had to come off the roster," said Mattingly. "We kind of knew Trono was not going to make the club and he was out of options. If he ends up at Triple-A, that's good for us. Honestly, we want guys to be in the big leagues."
Troncoso was competing for the final long-relief spot in the bullpen. That competition now is among Jamey Wright, Josh Lindblom, John Grabow, Angel Guzman, Wil Ledezma, Fernando Nieve and Scott Rice.
According to general manager Ned Colletti, Wright and Grabow have opt-out clauses they can trigger on Sunday, which gives the Dodgers until March 30 to guarantee their Major League salaries or grant their releases.