On the topic of maintaining longevity despite heavy mileage, Bernard Hopkins has credentials.
And when it comes to the Philadelphia Eagles, he also carries some serious bona fides.
So maybe folks ought to consider Hopkins' opinion on his dear team's decision to trade running back LeSean McCoy to the Buffalo Bills for linebacker Kiko Alonso.
"Oh, I'm pissed," Hopkins told me Wednesday.
At 50, Hopkins still is boxing.
Remember when George Foreman stunned the planet by winning the heavyweight title at 44? Hopkins won his most recent world championship a year ago at 49. He lost his IBF light heavyweight belt five months ago, but hung around to the final bell with an undefeated fighter 18 years his junior.
But in all Hopkins' years, he hasn't seen anything like the transaction whirlwind Eagles coach Chip Kelly has orchestrated.
The Eagles this offseason have traded McCoy (their leading rusher), released linebacker Trent Cole, swapped out quarterback Nick Foles for Sam Bradford, added running backs DeMarco Murray and Ryan Mathews, linebacker DeMeco Ryans and positionmajig Tim Tebow.
"Kelly makes moves everybody else might be shy to do because they don't want to be wrong," Hopkins said, "but you still have to be right.
"This town will make you step your game up."
Hopkins immediately tweeted his displeasure over the McCoy trade on March 3.
— BERNARD HOPKINS EX (@THEREALBHOP) March 3, 2015
He hasn't cooled down much.
Hopkins suggested the McCoy move would haunt the Eagles, even though the two-time All-Pro -- 11 months younger than C.J. Spiller -- has many more touches than Fred Jackson, the NFL's oldest running back.
"The LeSean McCoy move was a major move, a very, very bold move," Hopkins said. "He's going to give us problems.
"I think we gave up two, three good pieces. I don't think you give away key players when they have two, possibly three more years left. A young guy can get hurt, too. We should've kept at least two of those pieces to capitalize on the momentum that I believe we had."
The Eagles went 10-6 last season, finishing second in the NFC East but falling a victory short of the playoffs.