Ty Conklin was the likely starter Friday night against the Edmonton Oilers in the Blues' first game since the All-Star break. Halak has played in 39 games, going 17-16-5 with a 2.66 goals-against average and .907 save percentage.
The 24-year-old Bishop was a third-round pick in the 2005 Entry draft. In 26 games with Peoria he's 13-11-1 with a 2.59 goals-against average and two shutouts.
Bishop, a native of St. Louis, appeared in six games with the Blues in 2008-09 and has a career record of 1-1-1 with a 2.94 goals-against average.