The health of Tony Romo and Dez Bryant gives the Dallas Cowboys reason to believe they can have a turnaround as dramatic as the one that sent them tumbling in the other direction a year ago.

At the same time, executive vice president of personnel Stephen Jones isn’t ignoring a defense that couldn’t make game-changing plays and finished last in the NFL in takeaways and turnover margin.

“We’re not sticking our head in the sand right here and saying, `Well it’s all about the injuries,”‘ Jones said. “But I still say a lot of teams have a big problem if they don’t have their main signal caller. Should we have won more games? Of course we should have. I do think we can have a major turnaround.”

Romo had a full offseason after missing 12 games in a 4-12 season with a twice-broken left collarbone. The other key component of Dallas going from first to last in the NFC East following a 12-4 run in 2014 was Bryant breaking his right foot in the opener and never getting to full speed coming off an All-Pro season.

While Bryant was mostly held out of offseason workouts coming off two surgeries on the foot, all signs point to him being ready when training camp opens July 30 in Oxnard, California.

And that has Romo and his top receiver getting questions about how good the offense can be after adding Ohio State star running back Ezekiel Elliott with the fourth overall pick in the draft, which has produced three first-round picks in the offensive line for Dallas since 2011.

“We’re not ready to talk about the season,” Romo said during offseason practices. “We are trying to figure out how to get better right now. For us, we have a long way to go. Just got to get to work and put your head down right now and work your butt off.”

The defense had trouble rushing the quarterback last season and will be without young projected starters DeMarcus Lawrence and Randy Gregory the first four games on substance-abuse suspensions.

Rolando McClain will miss the first 10 games for the same reason, and might even get released before camp because the mercurial linebacker will be out more than half the season anyway.

“Right now on paper I don’t think we’ve got anybody who’s ever had 10 sacks in a season on the roster,” Jones said. “That one sticks out like a sore thumb.”

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