Note **CBA - assumed similar rules.
Memphis needs to take care of their own house, Center Marc Gasol & PF Zach 'Zebo' Randolph are FA's. After signing Gasol (26 yrs old) this team will either go right to the cap to retain Zebo or look for a replacement. Keep in mind this guy is a headcase and on the wrong side of 30. With that in mind Glen Davis could be a good fit there, he can score and help their defense. He isn't Zebo but he is also younger, cheaper and has a decent track record as 6th man and 2009 as KG's replacement.
A sign & Trade would likely be a great fit since Mayo will pull in 5.6M (very close to MLE money) which probably isn't far off of BBD's market value. (Memphis of course is very willing to deal Mayo, see Feb trade deadline)
Why do the C's want another undersized SG? Well he can score, like a star. In 3 years he has shot 44/38/83 (rounded up) from 2pt/3pt/FT. He can shoot yes but he can take it to the hole too. I think he'd be an ideal scoring threat of the bench to spell Ray Allen, plus he's under team control for 2 more seasons. He also averages over 3 RB's, 2 assists and a steal a game with a 16 ppg socring average in 3 years. Think Jamal Crawford but 8 years younger.
Lineups with Rondo at PG, OJ at SG and Jeff Green at the 3 would give the C's a real running/scoring lineup. OJ would fit much better in the role of a top scoring option off the bench than Green who clearly wants to play within the team more so than take over. OJ maybe be a knucklehead but I have faith in Doc & the vets to keep players in line and help him reach his potential. This could be a useful move for both teams.