The Los Angeles Chargers rolled the dice this offseason at edge rusher.  No great secret now and it’s worth coming back to in the post-draft glow. At that third edge rusher spot behind Khalil Mack and Tuli Tuipulotu, the Chargers let Odafe Oweh get away in free agency despite sitting on nearly $100 million in cap space.  To compensate, the Chargers drafted Akheem Mesidor in the first round. A fine prospect, but one with a big problem: He’s already 25 years old.  By taking an older prospect, the Chargers gamble on his quick adaptation to the NFL so he can play well in that third spot right away.  But it’s never so simple, right? And it has some in the NFL rightfully wondering why the Chargers didn’t just eat the cash hit and keep Oweh.  Did Chargers make a mistake with Odafe Oweh and Akheem Mesidor? Akheem Mesidor | Kirby Lee-Imagn Images Last season, the Chargers made a low-risk trade with the Baltimore Ravens, acquiring Oweh, a former first-round pick.…