Trade 1: Rivers/Tyrell Williams/Michael Schofield to the Titans
I know, but hear me out. Rivers is an amazing quarterback with years of experience and he is no doubt the captain of this team and the face of the franchise. Although he is aging, he still has a few years left in the tank and he would give the Titans a HUGE advantage in the AFC South (18-6 record).
Tyrell Williams is another superstar with his speed, size and ability to step up in some big moments. Williams would help a young receiving corps and serve as a leader and a much needed upgrade with his three years of starting experience.
Michael Schofield is probably the most likely of these three to actually be traded but still a valuable player to the team due to his ability to play all of the positions on the O-line. This would beef up an offensive line that needs a lot of help in the middle and would in turn open up the running game for Demarco Murray and Derrick Henry.
For these three players, the Bolts in return get Marcus Mariota and Jurrell Casey. Mariota took a step back in his development in 2017, and it was mostly due to his team crumbling around him and overall inconsistent football. He did, however, take his Titans to the playoffs and made it out of the first round before being demolished by Tom Brady and the New England Patriots the following week.
Under the right coaching and offense, Mariota can thrive in a Ken Whisenhunt run offense. Coincidentally, Whisenhunt coached the 24-year old in his rookie year so he would definitely play to his strengths and develop the young quarterback to succeed. With Keenan Allen and Hunter Henry as weapons, the transition would be a whole lot easier.
Jurrell Casey was third on the team in sacks and he poses a lot of problems with his quickness and size. He would fill a much needed position on the inside and quickly help improve the defense. With Melvin Ingram and Joey Bosa on the outside, this defensive line would easily be the most dominant in the NFL.
As a result, The Chargers can go to free agency and pick up a veteran quarterback or simply re-sign Kellen Clemens without having to worry about drafting a predecessor and they can use their pick on an inside linebacker or a safety.