EAST RUTHERFORD, N.J. (AP) -- Ryan Nassib had a big chance to show everyone what he could do as New York Giants quarterback with Eli Manning getting the night off.
He blew it after a good first quarter.
Nassib was consistent in leading the Giants on a game-opening touchdown drive and cashing in on an interception in staking New York to a 10-point lead.
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But his three second-quarter turnovers led to 17 points in the Miami Dolphins' 27-10 victory in the preseason opener Friday night.
The start of the game was delayed 51 minutes by weather, pushing back the coaching debuts of Ben McAdoo of the Giants and Adam Gase of the Dolphins.
Neither coach had a lot to be happy about in a game marked by turnovers and penalties.
Miami had nine penalties for 61 yards and one turnover. New York had four turnovers and seven penalties for 56 yards.
A 3-yard run by Rashad Jennings and a 20-yard field goal by Josh Brown following an interception by Jonathan Casillas staked New York to its first-quarter lead.
Nassib turned over the ball on three consecutive second-quarter possessions to give the Dolphins the lead.
Bobby McCain's interception led to a 49-yard field goal by Andrew Franks. A fumble and return by Spencer Paysinger set up Damien Williams' 5-yard TD run, and an interception by A.J. Hendy led to a 51-yard TD pass from Matt Moore to Matt Hazel.
Marshall Koehn added a 28-yard field goal in the third quarter and Zac Dysert capped the scoring with a fourth-down, 16-yard pass to Thomas Duarte, a score that followed a fumble by third-string quarterback Logan Thomas.
Dolphins: Ryan Tannehill finished 2 of 4 for 8 yards. Moore was 10 of 14 for 122 yards and a touchdown. Brandon Doughty, the seventh-round pick from Western Kentucky, finished up and looked good, hitting 7 of 9 for 66 yards.
Giants: Nassib finished 7 of 15 for 75 yards with the three turnovers in a performance that will not inspire confidence that he would be able to step in and replace Manning. After holding the ball for more than 18 minutes in the first half, the offense was limited to nine minutes of possession in the second.
Dolphins: Dolphins first-round pick Laremy Tunsil didn't start, but played most of the game at left guard and held his own. Leonte Carroo, the former Rutgers star who was Miami's third-round pick, had three catches for 18 yards. Sixth-round pick Jakeem Grant had four catches for 68 yards.
Giants: First-round pick cornerback Eli Apple played well until straining his lower leg. Second-round pick Sterling Shepard had one diving catch for 24 yards, setting up the Giants' touchdown.
Dolphins: Franks woke up the Dolphins' offense with a 49-yard field goal in the second quarter. Koehn showed a good leg on kickoffs.
Giants: Big games for the rookies. Apple, Shepard and S Darian Thompson are all going to contribute, along with MLB B.J. Goodson, who had seven tackles, including two for losses.
NOT SO STEAMY
The late start and the pre-game rain dropped the temperature to 76 degrees at kickoff. The rain convinced McAdoo to sit Odell Beckham Jr.
Dolphins: Grant (rib), S Shamiel Gary (neck), DE Chris McClain (elbow) and DE Julius Warmsley (concussion) did not return.
Giants: Apple and Shepard were hurt in the first half and did not return. WR Geremy Davis pulled a hamstring in the second half. Veteran Victor Cruz was already out with a groin injury.
Dolphins: "The defense got their hands on the ball multiple times and turned the game around for us," Tannehill said. "The offense, we didn't get much going in the first half, first or second group. But they started getting their hands on the ball and flipping the momentum and really got the game going for us."
Giants: "Ball security is the No. 1 priority and I didn't do a good job of it," said Nassib, who has thrown 10 NFL regular-season passes in his first three seasons. "We have a lot to work on, but the turnovers are unacceptable. You never go into a game expecting to throw interceptions, obviously when you fail it's disappointing and frustrating, but we have to bounce back and get back out there."