Andrews missed Wednesday's practice with an unspecified injury, Ryan Mink of the Ravens' official site reports.
Head coach John Harbaugh said there's "nothing serious" going on with Andrews, noting that the tight end is "just dealing with something that we're kind of working through right now." With that in mind, Andrews is looking unlikely to play in Saturday's preseason finale against the Buccaneers, while focusing on readying himself for Week 1.