Fox is pulling one new live-action comedy from its schedule, and canceling another.

The network is yanking struggling Sunday night freshman comedy "Sons of Tucson" from the air after four episodes and has confirmed the cancellation of long-running series " 'Til Death."

"Tucson" is off the schedule for the rest of the season, replaced by usual time-period holder "American Dad." Fox will return the remaining eight episodes to Sundays at 7:30 p.m. in the summer.

Launched in 2006, " 'Til Death" will finish its run at Sundays at 7 p.m. this summer. The Brad Garrett comedy has been a utility player for the network, filling holes around the schedule, but has been low-rated for years.