Wright has been on the disabled list since April. He originally went on for a hamstring injury, but was shut down indefinitely in May because of spinal stenosis, a major lower-back issue.
Wright began a rehab assignment with the High A St. Lucie Mets in the second week of August. In eight games, Wright hit .321 with one RBI and five walks in the minors. He also struck out six times.
Mets manager Terry Collins said although Wright will start, and potentially hit second in the lineup, it's unclear how often he will play. The Mets will rely on feedback from Wright on his back to determine when he can play and when he will need rest.
Wright is a career .298 hitter with 231 home runs in 12 seasons.
The Mets entered Sunday 4 1/2 games ahead of the Washington Nationals for first place in the NL East.