All signs point toward Al Horford leaving the Boston Celtics this summer in free agency to get more money, and Celtics legend Paul Pierce completely understands Horford's decision.

Horford declined his $30.1 million player option for next season with the Celtics. Multiple reports have stated the All-Star big man is going to sign a four-year deal worth around $112 million with some team in free agency.

Pierce says when players like Horford know their playing careers are almost over, they are going to chase big contracts on the open market.

“A lot of these guys when they get in their late 20’s or early 30’s and they know there’s light at the end of the tunnel, they try to maximize their dollars,” Pierce said, via Mass Live. “So if there’s an opportunity for Al Horford to get more money, I’m sure that’s something you have to look into.

“It might have been different if they won a championship with him here, but they didn’t win a championship and now he’s at the point where this is his last big contract. You gotta understand the player is always going to do what’s best for them and their family.”

Horford is 33. This is likely going to be the last big time contract he's going to get in the NBA. You can't blame Al at all for wanting to maximize his earning potential.

This past season for the Celtics, Horford averaged 13.6 points and 6.7 rebounds while shooting 53.5 percent from the field and 36.0 percent from beyond the arc.