After three seasons, he was released at the end of the 2013 Training Camp, signed as a free agent with Jacksonville, and would then finish his eight-year career with New England, Detroit, and New Orleans.
"Going from Philadelphia to Jacksonville, I loved my time in Jacksonville and I think I played my best football there, but there was nothing like playing in the Linc in front of the Eagle fans. I mean, Philly fans bleed green. They're die-hard. They're generational fans," Harbor says.
"I go by a coffee shop in South Philly, and a guy knows exactly who I am. I'm not the biggest name guy, obviously, but I'm like, 'Wow! That's incredible.' They love the Eagles. You know, it's not just a fan thing, it's the culture. It's Eagles culture. The underdogs. It was really cool to be a part of that."
What makes Harbor most proud of his career?
"The fact that I did have some setbacks, got released, but I always bounced back and never got down on myself," he says. "I thought I was good at certain things and should have been used a certain way, but that never stopped me from being versatile and making sure that I could change and adapt. I was able to overcome a lot of adversity. I had eight surgeries in my life, six in the NFL, and was able to always bounce back and make a lot of different teams."
Strangely enough, one of Harbor's non-NFL-related surgeries came after he injured his wrist while playing football six years ago as one of the contestants trying to swoon Becca Kufrin on the ABC reality series – The Bachelorette.
"A buddy of mine had tried out. He didn't make it and got approached again. But at that time, he was dating a girl who ended up being his now wife. So he's like, 'Hey, I'm sorry I can't do it. But I've got a couple buddies you might like,'" Harbor says.
"This is while I was still playing football. They called me, 'We'll work around your schedule,' blah, blah, blah. I saw Jesse Palmer did something like that. Travis Kelce did something like that. Jordan Rodgers, Aaron Rodgers' brother. I'm like, this could lead to something afterwards. It's just a dating show for a couple weeks. What's the worst that could happen? And I end up getting injured.
"But it was an interesting experience being in that reality TV world. It's a chapter in my life. Looking back at it, sometimes I'm like, what the heck were you thinking? But I'll have a lot of stories to tell when I'm an old grandpa one day at the kitchen table."
Far from being an old grandpa, Harbor is single and still searching for the right bachelorette. Making his home in Chicago, he's involved with sports media, working with NBC Sports Chicago, Stadium TV, 670 The Score, Big Brand, and doing color commentary for the Missouri Valley Football Conference on the Marquee Sports Network.
"It's been great being able to live that dream," Harbor said. "I just continue to expand on my sports media career. As well as speaking. I'll have a couple of speaking engagements a month and just kind of tell my story about basically coming from being underprivileged to this guy that was able to make the NFL from a small town, a small college. And how discipline is really the most important thing in your life. Not so much talent, so to speak, and that grit will overcome talent in the end. If you just stay consistent, you will achieve what you want to achieve."
Speaking of which, Harbor is also working toward his goal of earning an MBA from the Kelley School of Business at Indiana University.
"Sports came easier to me, it was something I enjoyed, but I was diagnosed with dyslexia when I was young and school was something that wasn't easy," Harbor says. "And now to be in the Kelley School of Business on the NFLPA Scholarship ... when I finish, that's going to be something that I'm very proud of, right up there with getting drafted.
"I know how difficult school is for me, how much harder it is. Some people are good at school, some people are good at football. I was good at football. But if you are consistent, if you work at it, you're going to get better and improve, and that will just be a story of perseverance for me to finish that."