A week ago, a Celtics dynasty was plausible. They were -900 favorites against the New York Knicks before their second-round series began. That number is +400 on Caesars after Tatum's injury news. Just by virtue of playing in the Eastern Conference,

Jayson Tatum underwent surgery to fix his ruptured Achilles. USA TODAY Sports' Jeff Zillgitt explains the ramifications of the Celtics star's injury.

Tatum suffered an apparent leg injury late in Game 4 of the Eastern Conference semifinals, and he is set for further evaluation Tuesday with Boston one loss from elimination.