The book is closed on the McLane Carter era.

The Rutgers graduate senior quarterback is not expected to play again this season, interim head coach Nunzio Campanile said Monday. Carter, who joined the Scarlet Knights this past offseason after stints at Texas Tech, Incarnate Word and Tyler Junior College, has not played or been seen at practice since he suffered a concussion in the first half of Rutgers’ loss at Iowa on Sept. 7.

“To the best of my knowledge, he probably will not play again this year,” Campanile said. When asked if it was a medical decision, Campanile said “yes," and Carter’s status should be considered a medical retirement, according to a person with knowledge of the situation.

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Carter is still enrolled as a student at Rutgers, according to the university directory. Public social media postings indicate he is still living in New Jersey. His college eligibility is now exhausted without a medical hardship waiver from the NCAA - something Carter would likely struggle to get, according to a source. Carter redshirted as a true freshman at Incarnate Word and has transferred three times in his college career.

Carter beat out sophomore Artur Sitkowski for the starting job in training camp and then had a strong debut game in the season opener against UMass, captivating Rutgers fans with 340 yards passing and two touchdown passes (and three interceptions) on 21-of-31 passing as the Scarlet Knights steamrolled the Minutemen for their only win this season. Carter then had an abysmal game against the Hawkeyes, finishing 6-of-16 passing for 21 yards and an interception before exiting the game with a head injury.

With Carter out of the picture and Sitkowski planning to redshirt (although he could play in one more game in an emergency situation), redshirt freshman Johnny Langan is now Rutgers’ starter and true freshman Cole Snyder is the backup quarterback. Langan made his first start in last Saturday’s 48-7 loss to Maryland at SHI Stadium in Piscataway and Snyder made his college debut, coming in for one play while Langan’s bloody hand was being bandaged.

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The lone snap counts as one of the four games Snyder can play this season and still redshirt in order to preserve a year of eligibility. Campanile said it’s possible walk-on redshirt freshman Austin Albericci, who has never played in a college game, could be used in similar situations going forward in order to save Snyder’s games. Rutgers will also likely establish a wildcat direct-snap package featuring running back Isaih Pacheco, who played quarterback in high school at Vineland.

“Yeah, [Albericci] could be a possibility, as well and we will probably create some wildcat stuff, too, if we get in a situation where you don’t want to burn a play," Campanile said. “Isaih was a high school quarterback and is a pretty talented runner.”

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James Kratch may be reached at jkratch@njadvancemedia.com. Follow him on Twitter @JamesKratch. Find NJ.com Rutgers Football on Facebook.