Weston Richburg's move to center became a little more certain on Monday when the Giants released incumbent starter J.D. Walton.

Walton started all 16 games for the Giants in 2014 while Richburg played guard, but the Giants believe center is Richburg's natural position. That's where they envisioned him playing when they drafted him in the second round last spring.

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The Giants will save $3 million against the 2015 salary cap by releasing Walton, although they are still on the hook for $625,000. The Giants have about $13 million in cap space heading into free agency; they also used roughly $15 million to apply the franchise tag to Jason Pierre-Paul on Monday.

Walton signed with the Giants last offseason after missing most of the previous two seasons because of injuries.

Besides Richburg, the Giants also have veteran Dallas Reynolds and newly signed Brett Jones to compete for the starting job. Reynolds was re-signed by the Giants last month. Jones was the top offensive lineman in the CFL before signing with the Giants last month as well.