Andrew Luck understands it will take time to prove his surgically repaired throwing shoulder is as good as he says it is.

First Authentic Mike McGlinchey Jersey , he must pass a few more self-imposed tests.

As the Indianapolis Colts reported to training camp Wednesday, their incumbent quarterback sounded as eager and antsy as he did when he arrived as the highly touted No. 1 overall draft pick and hand-picked successor to Peyton Manning in 2012.

"I'm nervous. It will be interesting to step on the field again and practice and there will be some times that I'll scratch my head and say what the heck did I just do? What the heck is going on?," Luck said before later acknowledging one concern. "I don't want to fumble the first snap is what I don't want to do."

There are plenty of reasons for angst.

Thursday's opening practice in Westfield, Indiana, a northern suburb of Indianapolis, will be the first time Luck has practiced or played in front of fans since January 2017.

Many of the names on the roster have changed since he threw a regular-season pass and some veterans still have not been in a huddle with Luck.

First-year coach Frank Reich has installed another new offense, the fourth Luck has learned as he heads into his seventh pro season.

Luck has not taken a hit in 19 months, and everyone will be monitoring Luck to see if he can fully recover from the partially torn labrum in his throwing shoulder.

The Colts don't seem to be worried.

"When he practices, he's full go. There are no restrictions," Reich said. "The reps are all counted out, so it's easy to do the math."

The initial plan calls on Luck to mimic his regular-season routine, throwing three days and taking one off.

But the irregular camp schedule will look slightly different. For instance, Luck is expected to throw Thursday and Friday before sitting out Saturday and then returning Sunday when Indy holds its first night practice at the new training camp site, Grand Park Sports Campus.

"We'll be in pads Sunday and we don't want him to miss that Youth Armani Watts Jersey ," Reich said.

Luck also will participate in live drills, which Reich describes as more physical than the Colts likely had in recent seasons. Reich replaces Chuck Pagano, who was fired just hours after last season's finale after six seasons with the team.

Luck won't be seen only at practice.

Reich intends to use Luck in preseason games, tentatively setting his debut for the Colts' Aug. 9 opener at Seattle. General manager Chris Ballard hinted that could be the case last week.

The best news for Colts' fans, though, might be the fact that the pain Luck played with for most of 2015 and 2016 and kept him out all of 2017 has subsided.

"I feel like I'm in a much better place. I'm the best I've felt in a long, long, time," he said. "I've got work to do still, I've got things that I'm going to have to go out and prove to myself. But I feel a lot better."

He's been throwing since May and spent the time between minicamp and reporting day working out in California with a cadre of receivers including teammate Chester Rogers. Reich watched footage from the workouts and said he could see a steady, consistent progression.

But Luck knows workouts on college fields don't necessarily translate to success on Sunday afternoons.

"I've got some work to do still and there is going to be a situation on the practice that I have not been in yet 鈥?like having to avoid a guy and playing at that little extra tempo, that speed," he said. "So there are steps I still need to take. I'm not kidding myself, and with that comes the endurance http://www.cardinalsauthorizedshops.com/authentic-mason-cole-jersey , the 'Oh, that's how I've got to throw the out to T.Y. (Hilton) or that's how it is over the middle to (Jack) Doyle.'"

The Colts are doing their part to keep Luck healthy.

They invested heavily in revamping the offensive line, drafting guard Quenton Nelson in the first round, guard Braden Smith in the second round, re-signing versatile veteran Jack Mewhort and adding veteran free agent Matt Slauson.

And Luck hopes that making the effort to avoid preventable hits keeps his comeback on track, too.

"I think I'd be a bit of a fool not to (change)," he said. "I have to learn how to protect myself and how to protect the team."

Notes: Safeties Clayton Geathers and Malik Hooker and guard Jeremy Vujnovich 鈥?all starters last season 鈥?have been placed on the physically unable to perform list. Geathers had offseason knee surgery, Hooker tore the anterior and medial collateral ligaments in October and Vujnovich pulled his calf while working out on his own this summer. ... Running back Robert Turbin said he "let his teammates down" by violating the NFL's policy on performance-enhancers. He will miss the first four regular-season games. ... The Colts signed safety Shamarko Thomas and waived cornerback Juante Baldwin on Wednesday. The 5-foot-9, 205-pound Thomas has played 60 games with the Buffalo Bills and Pittsburgh Steelers since 2013. Baldwin was an undrafted rookie.

Paul Guenther is installing a new defense for the Oakland Raiders with the most important part of the unit missing.

Star pass rusher Khalil Mack remains away from the Raiders in a contract dispute this offseason while Guenther works on rebuilding a defense that has been one of the league's worst for more than a decade.

"He's going to have a lot of catching up to do," Guenther said Tuesday.

"We're going to have to have a plan for that for sure. I'm really concerned about the guys that are here now working. These guys have been busting their tails every day. Coming in early. Meeting with the coaches. Being great in the meeting rooms. Communicating on the field."

Mack, the 2016 AP Defensive Player of the Year, is entering the last year of his rookie contract that pays him $13.85 million this year and is seeking a long-term deal that will make him one of the most highly compensated non-quarterbacks in the NFL.

Mack has missed the entire voluntary portion of the offseason and has not indicated whether he plans to report for next week's mandatory minicamp or risk fines of more than $80,000.

Guenther's focus now is on the defenders who are at practice this offseason.

"I'm trying to get the guys that are here better," he said. "These guys have been busting their tails Kyzir White Jersey Chargers , trying to get better. Trying to make the team. There's some guys out there that I really think have a lot of uncovered ability.

"We're trying to get it out of them to understand, 'Hey, you might not be a 60-snap-a-game guy. You might be a 15 snap-per-game guy, do the best job in your role and how you can help us win.'"

Guenther was one of Jon Gruden's first hires after being brought back for a second stint as coach in Oakland back in January and immediately given a tough task.

The Raiders defense has consistently been one of the league's worst the past 15 years under coordinators Chuck Bresnahan, Rob Ryan, John Marshall, Jason Tarver, Ken Norton Jr. and John Pagano.

Oakland ranks last in the NFL in takeaways and points allowed in that span, second worst in yards allowed per game and third worst in sacks as the unit has struggled consistently from the front seven to the secondary.

Guenther's defenses in Cincinnati have been some of the best in the league during his time as coordinator there.

"Paul Guenther's defense, it's very aggressive," new middle linebacker Derrick Johnson said.

"So many different looks. The onus is really on the linebackers to learn a lot of stuff. That's good for myself because I know a lot. It's putting a lot of pressure on me to learn it quickly.

"Learn it well enough where I can put my own flavor in making plays on this defense. I'm having fun with it now. The last couple of days have been my best days, running around. ... Once you can get it down really well, you'll look a lot faster out there on the field. We all can run fast and jump high, but mentally Cheap Customized Oakland Raiders Jerseys , once you got it down, all your abilities, your talents can show out there on the field. That's what we're doing right now. We're not there yet, but we're getting there."

Last year was particularly bad when the Raiders became the first team to fail to intercept a pass for the first 10 games of the season and had just 14 takeaways all season.

To change that, the Raiders have made significant changes in personnel this offseason, bringing in Johnson to anchor the middle of the defense along with new linebackers Tahir Whitehead and Emmanuel Lamur; drafted Maurice Hurst, P.J. Hall and Arden Key to boost the pass rush; and signed defensive backs Rashaan Melvin, Daryl Worley, Marcus Gilchrist and Leon Hall.

Oakland is also hoping to get a boost with healthy seasons from last year's top two picks, cornerback Gareon Conley and safety Obi Melifonwu, who were limited to 127 defensive snaps as rookies because of injuries.

.