TAMPA — The Powers brothers, Conner and Keller, each rushed for more than 100 yards and a touchdown as Newsome held on.
The Wolves (1-2) had more than twice as many yards (291-143), but the Ravens (1-2) stayed in it.
With about two minutes left, Pierry Adonis recovered a fumble at midfield for Alonso. Dylan Fisher appeared to convert a fourth down with a 20-yard pass to Eddie Castillo to the Newsome 10, but a holding penalty nullified it. Josh Adams then sacked Fisher.
Touchdowns by the Powers and Harold Gussman's 39-yard field goal gave Newsome a 17-7 halftime lead. Brandon Holloway made it 17-14 by returning the second-half kickoff 98 yards.
The Ravens scored on their first series on Fisher's 1-yard run. That came after Vaughn Johnson partially blocked a punt.
Conner Powers gained 129 yards on 25 carries, Keller 104 on 10.
Don Jensen, Times correspondent