Here are several notes and observations:
What I liked: Dolphins rookie quarterback Ryan Tannehill was efficient in limited playing time. He made safe throws and finished 5-of-7 for 35 yards. Miami led 3-0 when Tannehill exited the game. He looks fairly ready for the regular season. Backup running back Daniel Thomas also ran well. The second-year tailback, who is in Dolphins coach Joe Philbin’s doghouse for tardiness, gained 31 yards on five carries. It appears Miami’s running game should be the best part of its offense.
What I didn’t like: The Dolphins have few playmakers and little depth. The backups were throttled by Dallas’ reserves, which is a trend we saw throughout the AFC East division this preseason. Dolphins No. 2 quarterback Matt Moore finished his miserable preseason, completing just 4 of 12 passes and another interception. This time Moore’s turnover was a pick-six. The receiver position is still an issue. No one has really stepped up to claim the top spots heading into the regular season.
Fields is ready: Miami punter Brandon Fields already is in midseason form. Fields’ punts were booming Friday. He had an average of 50.2 yards on six punts. With a young offense, Fields could be needed a lot this year.
What’s next: The Dolphins will travel in their regular-season opener to face the Houston Texans. It’s a tough game for Miami, which is rebuilding with a rookie quarterback, to hit the road and face a playoff-caliber team in its home opener.