Dolphins waive QB Mark Gronowski, sign two players for secondary

The Miami Dolphins have waived undrafted rookie quarterback Mark Gronowski ahead of their first preseason game. Gronowski struggled during training camp, throwing multiple interceptions, including two in a single practice session. The Dolphins did not add another quarterback but signed safety Tanner Wall and claimed cornerback Ahmari Harvey from the Pittsburgh Steelers to bolster their secondary. To make room for these additions, safety Omar Brown was waived with an injury settlement.

• 9:15 PMYahoo Sports — Dolphins cut struggling QB Mark Gronowski, add two newcomers