Boban Marjanovic signs three-year offer sheet with Pistons

The Detroit Pistons signed San Antonio Spurs restricted free-agent center Boban Marjanovic to a three-year offer sheet worth $21 million, his agent, Misko Raznatovic, confirmed Thursday.

The Spurs have three days to match the offer.

League sources told ESPN's Marc Stein, though, that the Spurs are already resigned to the knowledge that they will lose Marjanovic, knowing they can't match Detroit's offer sheet and keep the cap flexibility to complete their other planned moves this summer.

Pistons All-Star center Andre Drummond used Twitter to welcome the potential newest addition to his team.

The Spurs did make a move to bolster the team's inside play, reaching agreement Thursday to sign free-agent center Dewayne Dedmon to a two-year contract worth $6 million with a player option in the second year of the deal, an NBA source confirmed to ESPN's Michael C. Wright. The Vertical first reported the news.

The club is also bracing for the possible retirement of future Hall of Famer Tim Duncan, which also played a role in the team reaching an agreement on a two-year deal with Pau Gasol.

An NBA source said the Dedmon signing won't be official until "later in the process," as the sides are still working through some of the details of the deal.

Marjanovic, 27, from Serbia, appeared in 54 games in his rookie season. He averaged 5.5 points and 3.6 rebounds in 9.4 minutes per game.

A 7-footer, Dedmon came into the NBA with the Golden State Warriors, but has also played for the Philadelphia 76ers and the Orlando Magic. Dedmon averaged 4.4 points and 3.9 rebounds for the Magic last season, playing an average of 12.2 minutes.