The Lakers are three weeks away from training camp, and they’re still making tweaks to their roster.

The team announced the signing of free agent forward Shawne Williams, whose career-best season in 2010-11 coincided with playing for coach Mike D’Antoni and the New York Knicks. The terms of Williams’ deal weren’t immediately available. But considering the Lakers want to keep financial flexibility for the 2014 offseason, it wouldn’t be surprising if Williams’ contract is a one-year deal at the veteran’s minimum.

Williams, whom the Indiana Pacers drafted with the 17th overall pick of the 2006 NBA Draft, has averaged 5.7 points and 2.8 rebounds in 16.4 minutes through six NBA seasons. He’s had numerous stints with the Indiana Pacers (2006-2008), Dallas Mavericks (2008-09), New York Knicks (2010-11) and New Jersey Nets (2011-12). During his time with the Knicks under D’Antoni, Williams averaged a career-high 7.1 points in 20.7 minutes. Williams hasn’t played an NBA game since Feb. 2012 after suffering a foot injury. The Nets traded him March 2012 to the Portland Trail Blazers, who eventually cut him.

The Lakers have 13 players under contract, but they are expected to add more players to its training camp roster. NBA teams can hold a maximum of 15 players on their roster, though it’s possible the Lakers feature 13 or 14 players for their season opener Oct. 29 against the Clippers at Staples Center.

The Lakers have yet to sign Ryan Kelly, whom the Lakers selected 48th overall out of Duke. He’s still rehabbing from a foot surgery he had in April. Meanwhile, players such as Lou Amundson, Marcus Landry, Nick Minnerath have been linked to the Lakers’ roster.

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Follow L.A. Daily News Lakers beat writer Mark Medina on Twitter. E-mail him at mark.medina@dailynews.com