DAVIE, Fla. -- The Miami Dolphins (1-0) continue their preparation for Sunday’s matchup against the Buffalo Bills (1-0).

Here are some notes and observations from Wednesday's portion of practice open to the media:

Miami rookie linebacker Chris McCain was not present for his second straight practice for an unspecified reason. Dolphins head coach Joe Philbin wouldn’t explain McCain’s absence on Tuesday, but the team will be required to list McCain on the injury report Wednesday evening. McCain made an impact in Sunday's win over the New England Patriots with a blocked punt and a sack. But his status is unknown for Week 2.

The Dolphins also were without defensive tackle Randy Starks, who was in a boot and did not participate in the portion of practice open to the media. Starks did practice on Tuesday. Miami defensive end Terrence Fede, linebacker Jordan Tripp, guard Billy Turner and center Mike Pouncey did not participate in the media viewing portion of practice.

There is some good news for the Dolphins on the injury front. Miami starting linebacker Philip Wheeler practiced for the second straight day. He was a late scratch last week due to a thumb injury. But his chances appear optimistic against Buffalo.