Buffalo had two spots left to fill on their practice squad. The Bills did so in short order on Monday, signing OL Ruben Holcomb and DT Robert Thomas.
Thomas, 27, was most recently with the New York Giants where he appeared in 23 games over the last two seasons. He was released during final cuts over the weekend.
Thomas (6-1, 331) has been a nose tackle his entire career and has previously served on the practice squads of Seattle, New England and Miami from 2015-2016.
Holcomb is an undrafted rookie out of the University of Indianapolis. He was a Division II All-American, who started 44 games in college, including 12 at left tackle as a senior in 2017.
The 6-4, 320-pound lineman was signed as an undrafted free agent by Tampa Bay, but did not make their 53-man roster over the weekend.
With the signings, Buffalo's 10-man practice squad is at its limit.