From Variety:

Jeremy Piven will abruptly end his run in Broadway's "Speed-the-Plow," after missing Tuesday evening's performance and a Wednesday matinee.

Piven has informed the producers that he hasn't been feeling well and that the condition is attributable to a high mercury count.

The show's producers weren't returning calls, but Daily Variety reached out to David Mamet, who wrote the showbiz satire and...