Holt was first called up from the Hartford Wolf Pack of the American Hockey League (AHL) in December 2005 as backup to Henrik Lundqvist while starting goalie Kevin Weekes was injured.

On October 30, 2008, Holt was signed as a free agent by the St. Louis Blues after playing two games for their affiliate the Peoria Rivermen.

[6] In June 2010, it was announced that Holt has signed a two-year deal with the Kontinental Hockey League club Dinamo Riga.

[7] On June 29, 2012, Holt signed a free agent deal with fellow KHL club, Avtomobilist Yekaterinburg.

[8] After appearing in 27 games for only 4 wins with the cellar-dwelling Avtomobilist, Holt was traded to HC Donbass for their playoff push to end the 2012–13 season on January 10, 2013.