While there are a ton of rumors and speculation swirling currently with NFL free agency and the draft just around the corner, it seems that there have been some rumblings about a few blockbuster trades.

Obviously, for a team to trade a superstar, it's going to take quite a bit, but according to ESPN's Mike Sando, there have been rumblings of five trades that involve big-name players. Each of the trades Sando touches on is either "proposed, vetted" and/or he "heard rumors about," so there's some level of reason to believe that the potential for these deals is there.

Quite a few of them really jump off the page, but the one that's possibly the biggest, at least to fans of the Oakland Raiders, would send All-Pro defensive tackle Gerald McCoy from the Tampa Bay Buccaneers to the Silver and Black.

Here's a look at what Sando and ESPN said about the potential deal, which includes the Raiders sending a second-round draft in return for the defensive tackle.

4. The Oakland Raiders send a 2018 second-round pick to the Tampa Bay Buccaneers for DT Gerald McCoy. Defensive tackle is a big question mark for the Raiders. McCoy, who turned 30 last month, remains a front-line player at the position. He is signed through 2020, with base salaries between $10 million and $13 million, and only $500,000 of proration remaining, all in 2018. Tampa Bay could use its early picks to revamp its defensive line, with an emphasis on outside rushers. There was some question among execs whether McCoy would command a second-round pick at age 30 and whether the Buccaneers could comfortably part with him. Buffalo could be another logical destination for McCoy. Tampa Bay could conceivably ask for defensive end Jerry Hughes as part of its return for McCoy. Hughes is scheduled to earn $7.35 million in salary and bonuses for each of the next two seasons. Sending receiver DeSean Jackson to Kansas City for Dee Ford was another suggested trade to help the Bucs' pass rush, despite doubts over whether the Chiefs would be interested in Jackson at this stage.

That's a pretty wild thought, to be honest.

Having McCoy paired up with superstar pass rusher Khalil Mack would be daunting for opposing offensive lines.

Even more importantly, this would instantly address one of the biggest needs for the Raiders ahead of the 2018 season. While giving up a second-round pick is tough, you don't have the chance to land a player like McCoy every day.

If this trade were to happen, Jon Gruden and company could lock in on either a linebacker, defensive end or cornerback with their first-round pick. Plus, they'd have the option to trade back in the first round to add another pick so they could address two of these positions in the first 2-3 rounds more than likely.

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