Which is the most successful NBA move that was free of charge? (2:06).Sources told ESPN's Adrian Wojnarowski that the Philadelphia 76ers and center Andre Drummond reached an agreement on Tuesday for a one year deal to provide the veteran's minimum Tuesday.Drummond, a two-time All-Star who led the NBA's rebounding four times during his career, will be joined by Joel Embiid, the 76ers superstar big man. They have been friends for many years and often played against each other during their time together in the Eastern Conference. Drummond was with both the Detroit Pistons (now the Cleveland Cavaliers) and the Cleveland Cavaliers (now the Eastern Conference).Embiid had Drummond ejected in the fourth quarter in a 2018 game with a flop. Drummond's arm was up near his head and he then called Drummond a "bum". A few weeks later, Embiid tweeted that Drummond was a "bum".Drummond's view was that this turned into a swap with the Sixers and Lakers for backup centers. Dwight Howard, Embiid’s understudy last season, had returned to Los Angeles to join the Lakers on a Monday night during the opening hours free agency.Drummond signed with the Lakers just months ago, as the largest-name player on the buyout market. However, the fit became more difficult over time. Drummond's star in Los Angeles gradually dimmed and he was forced to sit out Game 6 of their first-round series against the Phoenix Suns. This was to complete his brief, rocky stint in Los Angeles.Drummond averaged 11.9 points per game and 10.2 rebounds during 21 regular-season games for the Lakers. Coach Frank Vogel stated repeatedly that Drummond was part of L.A.’s long-term future next to Anthony Davis. However, Marc Gasol seemed to make the team run more smoothly.The position was also in chaos with Montrezl Harrell, who was traded to Washington Wizards as a trade for Russell Westbrook, also playing the 5.Rob Pelinka (Lakers vice president of basketball operations, general manager) expressed regret about signing Drummond after the season was over.Pelinka stated, "His ability rebound the ball, protect the rim, and give us athleticism in the paint was an important ingredient to the team and something we would do again."The Sixers hope those skills can be applied behind Embiid who has been a perennial sore spot in Philadelphia for the past few seasons. In recent years, the Sixers have had a rotating roster of backup players, which included Howard, Al Horford, and Greg Monroe. Drummond is now the latest, and most unlikely, person to attempt to fill this job.Philadelphia opened the offseason with Furkan Korkmaz being resigned to a three year, $15 million deal. Later, George Hill was released. Hill's contract was not guaranteed for the 2021-22 season. After many other players went off the market quickly, Danny Green, a veteran guard, remains unsigned. He is currently one of the most important names on the market.This report was contributed by Dave McMenamin, ESPN.