Although there was some progress in negotiations with first-round pick Alex Mack, it looks unlikely the center from Cal will report for the start of Browns rookie orientation Friday.
Barring late-night negotiations Thursday, it appears the Browns will be without their top four picks — Mack and second-rounders Brian Robiskie, Mohamed Massaquoi and David Veikune.
Veterans report on July 31, with the first full-squad workout on Aug. 1.