Saturday: Day 6 of 18

The big slip: Quarterback Kevin Kolb slipped on a rubber mat and strained his left knee. Coach Doug Marrone said Kolb will be evaluated on a day-to-day basis.

Highlight: Backup offensive tackles Thomas Welch and Sam Young got to feel the joy of paydirt. Both caught touchdown passes after play-action fakes in goal-line drills. Both spiked the ball emphatically afterward.

QB watch: EJ Manuel took 31 snaps and Jeff Tuel 27 in team drills. Manuel was sharp.

Injury: Receiver Stevie Johnson is likely to be out several weeks with a pulled hamstring sustained Friday.

Schedule: The Bills practice 2:10-5:10 p.m. today. Monday’s practice is 6-9 p.m. but is sold out. The team is off Tuesday.