A lot had to go right for the Celtics to be where they are right now, 52-25 with a firm grip on the second seed in the Eastern Conference. There's no one player or person solely responsible for them being where they are.  But if we could pick one player, Neemias Queta might be that guy.  Exactly one year ago, on April 4, 2025, Queta played less than two minutes of garbage time in a blowout win over the Phoenix Suns. In the 62 games he played last season, 24 of them involved less than minutes of playing time. He only had one such game this season.  “It's unbelievable,” Jayson Tatum said after beating the Milwaukee Bucks . “I couldn't be more proud and happier for Neemi. The way he’s seeing the game, the leap that he's made as a screener, as a passer. [He’s] somebody we can trust when we throw him the ball in the seams, finishing, protecting the rim.” Queta’s year-to-year improvement has been off the charts.…