The Houston Texans officially requested permission to interview New England Patriots director of pro personnel Nick Caserio.

Caserio serves as the scouting right-hand man for head coach Bill Belichick in New England, but he is also a friend of Texans head coach Bill O’Brien. Caserio has been pro personnel director since 2008.

The first candidates to replace fired general manager Brian Gaine were former Cleveland Browns GM Ray Farmer and former Detroit Lions GM Martin Mayhew, according to multiple reports.

Farmer, who was fired by Cleveland in January 2016 after two seasons, was in Houston for an interview on Saturday, according to the Houston Chronicle.

Farmer, 44, served as the Kansas City Chiefs’ director of player personnel from 2006-12 before becoming the assistant general manager in Cleveland in 2013.

He was promoted to GM in 2014.

In March 2015, the NFL suspended Farmer for the first four games of the 2015 regular season for texting coaches during games in violation of league rules. The Browns were also fined $250,000.

Mayhew, 53, was in Houston for an interview on Sunday, NFL Network’s Peter Schrager reported. He is currently the San Francisco 49ers’ vice president of player personnel and previously served as the Lions’ general manager from 2008-15.

Other candidates linked to the Texans’ search include Patriots’ director of college scouting Monti Ossenfort, former Oakland general manager Reggie McKenzie and former Kansas City general manager Scott Pioli.