The Dolphins aren’t tackling in team drills.

TEs Aaron Halterman and Justin Peelle and OT Darren Heerspink spent yesterday’s practice on exercise bikes.

Says coach Tony Sparano about possibly acquiring WR Terry Glenn, ”I’ve had him for four or five years down there in Dallas, so I know the guy. But I don’t know about him right now.”

Sparano adds that the Dolphins are turning over “every rock” to try to improve the roster.

One local columnist says signing Glenn would make no sense.

But the Dolphins’ current receivers say they’d like to have him as a teammate.

Says DT Jason Ferguson, “He’s one of the best players I’ve seen play. Terry Glenn is guy who’s going to come in here and make an instant impact.

Sparano wants the team to be ready for “special situations,” like having to take an intentional safety.

Miami cut undrafted rookie CB Scorpio Babers and signed former Jaguars CB Chris Roberson.

WR Ted Ginn knows he has to prove himself.