July 15, 2014 at 11:02 am

Pistons release guard Peyton Siva, center Josh Harrellson

The Pistons' release of Josh Harrellson, left, wasn't a surprise, but Peyton Siva's departure was a bit of one. (Clarence Tabb Jr. / Detroit News)

The Pistons released guard Peyton Siva and center Josh Harrellson on Tuesday to make room for new acquisitions Caron Butler and D.J. Augustin.

Harrellson appeared to be the predictable choice to go after the Pistons reached a verbal agreement with backup center Aaron Gray last week. Releasing Siva, the 56th pick of the 2013 draft, came as a bit of a surprise, but with five point guards on the roster, including second-round draft pick Spencer Dinwiddie, Siva was the odd man out.

After struggling early last season, a stint in the D-League and extended practice time around veteran Chauncey Billups seemed to settle Siva down, and he improved by leaps and bounds toward the end of last season.

During the Pistons’ summer league play last week, Siva played the same role in settling the team down, showing the same poise he did at Louisville. The Pistons had until July 20 to pick up his option, but Pistons president Stan Van Gundy apparently declined.

With the other new additions the roster stood at 17 players before the moves.