Since getting traded to Boston on February 8th, Jaden Springer has mostly watched from the bench as the Celtics annihilated opposing teams, winning 18 of their first 20 games since his acquisition. In blowouts, he’s gotten some limited run, but since joining the Celtics, Springer has averaged just 5.5 minutes in 13 appearances. Yet, after a Celtics blew a 30-point lead to the Hawks, the 21-year-old defensive specialist was on the court to start the quarter, a rare opportunity to put his skillset to the test in a meaningful moment. “I can definitely help with some toughness and physicality,” Springer…