Spiller's defiance is a reflection of the motivation he has entering his fifth season in what's been an up-and-down career in Buffalo since being drafted with the ninth pick out of Clemson.
After having difficulty establishing a niche during his first two seasons in Buffalo, Spiller enjoyed a breakout year in 2012.
That's when he earned his first and only Pro Bowl selection after becoming only the NFL's seventh player to average 6-plus yards a carry by finishing with 1,244 yards on 207 attempts.
Spiller's average was a fraction of an inch behind league leader, Minnesota's Adrian Peterson. And it led Spiller to raise his expectations by suggesting a 2,000-yard season was not out of reach last season.
Unfortunately, the chances of that happening were derailed from the start.
Spiller was dealing with off-field issues last August, when his step-grandfather shot and killed two people before killing himself in Florida. Then he was undone by injuries by first straining his right quadriceps, before being hobbled by a high ankle sprain that never had time to heal.
He finished with 933 yards rushing and was limited to 10 starts in 15 games.
''Obviously, I wish I wouldn't have gotten hurt. But that's one of the things that just happen,'' Spiller said, assessing the year. ''But to be able to do what I was able to do with me just having one healthy leg, I thought it was very impressive.''
Fully healed, Spiller is eager to show he's regained his powerful stride.
''I feel 100 percent,'' he said.
The Bills are counting on that, because Spiller remains an integral part of their offense's strength: the run game.
Despite injuries to Spiller and co-starter
The additions were made to provide insurance against injuries. What they've also done is led to some speculation about Spiller being expendable because he's entering the final year of his contract.
Spiller dismissed the questions.
''One thing I've learned is that you can't believe everything out there, and I don't,'' he said. ''I'm a Buffalo Bill through and through. I love this place. This organization loves me. I'm here until further notice.''
Offensive coordinator Nathaniel Hackett foresees Spiller playing a big role in Buffalo this season.
''When you have a player like C.J., you want to get him out there a whole bunch,'' Hackett said. ''He's a great player, and we have to feature him just like we have to feature a lot of guys.''
The Bills are being careful in keeping Spiller fresh for the regular season by limiting his playing time in practice and preseason games. Spiller had just one carry for 2 yards in a 17-13 preseason-opening loss to the New York Giants on Sunday.
Spiller's ready, and still stung by what some people wrote or said about him last year.
''That's what people get paid to write,'' Spiller said. ''I definitely remember what was written. And I won't forget it.''