Maher will become an unrestricted free agent next month.
The Cowboys signed Vizcaino as insurance after Maher got a case of the yips in the team's wild-card victory over the Tampa Bay Buccaneers last month. Maher missed a postseason record four PATs against the Bucs.
Maher had another PAT blocked the following week in the Cowboys' 19-12 loss to San Francisco in the NFC divisional playoff game. He made two field goals, the only scores for Dallas.
Vizcaino, 26, played in three games last season - two for New England and one for Arizona. He made two field goals and three extra points in Week 10 for Arizona, while merely used for kickoffs by the Patriots.