You should try looking at the value this way. What would it take to replace Panik in free agency vs what would it take to replace Santana in free agency. For Santana I'll use Bruce and Martinez as the best comps this year. Bruce is a lifetime 250/320/475 hitter, coming off 254/324/508 this season, is basically zero threat on the bases, and is roughly average defensively thanks to a cannon arm. He's 30 and projects to get 3/39 in free agency. Martinez is a lifetime 285/342/514 hitter, coming off 303/376/690, is basically zero threat on the bases, and is a poor defender at a less demanding position(LF/DH). He's also 30 and projects to get 6/150 in free agency. Santana is a 261/353/468 hitter lifetime, coming off 278/371/505, and is slightly below average in RF but with a cannon arm. He's 25 and has 4 years of team control left. So if you need corner outfield, your options are to get decent production for 3/39, get great offensive production with defensive liability for 6/150, or try and swing a trade for Santana and probably pay 4/30. Don't forget that Santana is 25 and has upside while these guys surely will decline through the life of their deals. Santana is more likely to get even better than to get worse. Panik is a 282/345/408 hitter lifetime coming off a similar season, also a plus defender and not a threat on the bases. Panik is 27 and has 3 years of control left. Closest comp is probably walker. Walker is 32 and projects to get 2/20 in FA, I think that might be closer to 3/36. Walker is a 272/341/437 hitter career with a slightly better 2017. Not a threat on the bases, slightly below average defender. So a team could either sign walker for 3/36 or trade for panik and probably pay 3/18. Clearly way more surplus value in getting Santana, also more upside as Panik has likely close to peaked as a hitter while Santana likely will get better. Point here is Santana clearly has way more value than Panik. While Panik wouldn't be a bad piece to acquire, it would take a lot more than him to get Santana. Broxton would make more sense. Broxton is tough to comp because he's so young, dynamic, and frustrating. He is probably closest to comparable to the pre-breakout Carlos Gomez. But even pre-breakout Gomez didn't flash as much power as Broxton. A team trading for Broxton knows they are getting plus defense/speed at bare minimum, and a risky bat with tremendous upside. If it clicks even a little bit for him on the offensive side, trading for him could be the steal of the decade. And he's had stretches where things have clicked and he's produced like crazy. I have no idea why so many people discount Broxton so much, saying we should DFA or trade him for fringe prospects. Especially considering the CF available in FA, he's going to fetch a lot of interest on a variety of fronts. I don't know that Panik for Broxton is fair for both sides, but it's much closer than Panik for Santana straight up.