Take the money
I'm not familiar with US or Texas employment law, but consider this.
IBM have been having troubles (plural used intentionally) since the mid 1990s. They have been trying to be hip like someones older uncle since I was hip.
Being made redundant is unfortunate, especially if you're an older person. Mr Langley has been working for IBM since 1993 so hopefully he has built up a retirement pot and potentially a redundancy package. No details are mentioned in the original article, nor were any conditions attached to such a package. Given he's already proceeded with legal action I imagine the package, whatever it was is off the table.
Since he's engaged lawyers he's already spending whatever resources he has with the hope of reclaiming: lost pay, benefits, damages and legal fees. I have no appreciation of what the "damages" may be, but would the lost pay and benefits match the package he has already lost? The legal fees will be a win for the lawyers and zero for Mr Langley.
I'd be surprised if he recovers any serious wedge as a result of this action; whilst trawling his name through the headlines.
Personally I would have made taken the package and let my partners know of some newly found availability. After 25 successful years in sales he must have made some contacts.