AP photo Tampa Bay Buccaneers quarterback Tom Brady (12) celebrates his touchdown with offensive tackle Donovan Smith (76) in the first half of Sunday's loss to the Saints in New Orleans.

Former New England Patriots quarterback Tom Brady and his successor in Foxborough, Cam Newton, had different days Sunday to start their new NFL lives.

Brady was intercepted twice in his Tampa Bay debut, Alvin Kamara scored touchdowns running and receiving, and the New Orleans Saints beat the Tampa Bay Buccaneers 34-23 on Sunday.

Meanwhile, earlier in the day, Newton rushed for 75 yards and two TDs on 15 carries as the Patriots beat the Miami Dolphins, 21-11, at Gillette Stadium. Both games were played without fans in attendance.

The first of Brady’s interceptions led to Kamara’s 6-yard touchdown run. The second pick thrown by the new, 43-year-old Bucs QB — who left the New England Patriots in free agency after 20 years and six Super Bowl triumphs — was returned 36 yards for a touchdown by Janoris Jenkins.

Brady was 15 of 28 passing for 157 yards and one TD through the first 54 minutes of the game. He padded his numbers in garbage time, finishing with 239 yards and two TDs, the second scoring strike going to Mike Evans with 2:41 left. He did, however, have a 2-yard TD run on the Bucs’ opening drive of the game.

At Gillette, Newton’s 75 yards were the most by a Patriots quarterback since Steve Grogan had 81 in 1977. He also threw for 155 yards. His second TD put New England up 14-3 early in the third quarter. After Miami closed to within 14-11, Patriot back Sony Michel scored on a 1-yard run with 5:08 left to put the game away for the Patriots.