What happened: Conley returns after a previous stint with New England. Haack brings nine seasons of NFL experience to the punting room.
Why it matters: The additions reinforce two positions before New England's final preseason game. Harris and Prentice lose their roster spots ahead of the league-wide cutdown.
By the numbers: Haack has punted 478 times in 110 NFL games, averaging 45.0 yards with a 39.9-yard net.
What to watch: New England closes the preseason Thursday. Final roster decisions are due Aug. 30.