BOSTON -- While trying to savor a rewarding season in which they won 53 games, earned the No. 1 seed in the Eastern Conference and advanced to the Eastern Conference finals, members of the Boston Celtics acknowledged the gap that still exists with the Cleveland Cavaliers in their quest to elevate to a true title contender. LeBron James and Kyrie Irving paired up for 59 points as the Cavaliers flattened Isaiah Thomas-less Boston 135-102 during Game 5 of the East finals on Thursday night at TD Garden. The 33-point rout was the worst loss when facing elimination in Celtics history. The Cavaliers won the best-of-seven series 4-1 and advanced to meet the Golden State Warriors in the NBA Finals. "We see that the team to get past is Cleveland, and right now we're not there," said Celtics big man Al Horford, who is now 1-15 against James in his postseason career and has been eliminated by James' teams in each of the past three...