Sacramento Kings forward Harrison Barnes is planning to test the free-agent waters again in his career.

Barnes' agent reportedly informed the team that Barnes will decline his $25.1 million contract for next season and become an unrestricted free agent, ESPN's Adrian Wojnarowski reports. The news was also confirmed by James Ham of NBC Sports Bay Area.

BREAKING: Harrison Barnes has declined his $25.1M option for the 2019-20 season and will become an unrestricted free agent, sources confirmed to @James_HamNBCS.https://t.co/BieMaEAnt1pic.twitter.com/w9Jm9ChcVA — Kings on NBCS (@NBCSKings) June 18, 2019

One of the top small forwards in the free-agent marketplace, Barnes is pursuing a long-term deal but remains open to exploring a long-term contract with the Kings, Wojnarowski reports. Sacramento acquired Barnes from the Dallas Mavericks shortly before last season's trade deadline for Justin Jackson and Zach Randolph as the Kings tried to make a playoff push.

Although Sacramento was 28-26 at the time of the trade, it sputtered down the stretch of the season and finished 39-43, nine games behind the No. 8-seeded LA Clippers. After averaging 17.7 points, 4.2 rebounds and 1.3 assists per game with the Mavs (in 49 games), Barnes wasn't quite as productive with the Kings, averaging 14.3 ppg, 5.5 rpg and 1.9 apg (in 28 games).

Barnes was a restricted free agent in 2016 and signed an offer sheet with the Mavs, which the incumbent Golden State Warriors could not match on the restricted free agent after they signed Kevin Durant.