I've been wanting to deal Grandal for a while now, but I've come to appreciate his power and improved pitch calling. His pitch framing is obviously at the top of the game, but Barnes is not bad in that department in his own right even if he is not at Yasmani's level. Barnes also doesn't have as strong an arm or throw base-runners out as well either nor does he exhibit the same amount of power in his bat.
However, like
Quake said, Grandal will be a free agent in 2019 after his age 29 season and
MLBTradeRumors projects his salary arbitration for 2018 to be $7.7 million for 2018. While that's good value in terms of contract money for a single season from him, I'd prefer to get as much as we can for him in trade assets and dealing him might be selling at his highest point.
I don't want to count on Barnes continuing to hit as well as he has over the majority of his career as a starting MLB catcher, but I have full confidence in him moving forward to handle the role. Add in the fact that he makes relative peanuts ($540,000 for 2017) and is under team control for 5 more seasons and it's obvious that his play would far exceed his salary for the foreseeable future.
Like
Neddy said, we have so much catching depth in the developmental pipeline right now that we'll have to make room sooner or later. Keibert Ruiz and and Will Smith headline our backstop prospects but we also drafted Connor Wong, who has a similar profile to Barnes. And that does not include Farmer, who is currently on the postseason roster, or Antonio Cabello, the Venezuelan international prospect currently ranked 8th overall by MLB Pipeline and 15th overall by
Baseball America whom the Dodgers are reportedly pursuing as next year's J2 signing.
While I think we'd still need to sign an inexpensive vet backup C for next season since I don't think any of our minor-league catchers will be ready by next season, Smith has a very good chance of making the team in 2019 as a former college prospect. The exciting thing to think about is that any of Ruiz, Smith, or even Cabello has the talent to maybe even push Barnes out of the starting spot in the next few years. Wong should be ready around that time as well and could be a nice utility option for the majors. Farmer could also use a little more seasoning but seems to be close to being ready to handling a big-league role as either a backup or third-string catcher.
I would think that catching would be a premium commodity in demand, but I'll go with
Neddy's argument in narrowing down the Braves as the likeliest suitor for his services. That shouldn't be a bad situation for us at all given that the Braves have arguably the best prospects in baseball, but we'll have to see how much of their farm is left after MLB's investigation into their draft and international signings.
I don't really see too many holes on the Dodgers' roster outside of maybe outfield and starting pitching, so I'm inclined to pursue prospects in a trade for Grandal.
Quake makes a good point about getting value beyond a 2019 second-round pick since that is what we'd likely get in return as compensation for giving him a qualifying offer and letting him sign with another team as a free agent.
Personally, I have my eyes on Joey Wentz and Kyle Muller as LHP Braves prospects that I want as part of a package in return for trading Grandal. Wentz is currently ranked 8th in the Braves system while Muller is 12th. I don't think we have a realistic shot at Wentz, especially after MLB lays the hammer down post-investigation, but Muller was a guy I wanted the Dodgers to draft after the first round in 2016. Wentz was someone I believe all of us gave serious consideration to in that same draft before we came away with Gavin Lux, Smith, and Jordan Sheffield.
I've been concerned about our lack of LHP prospects in the developmental pipeline after Julio Urias, so getting either Wentz or Muller would address that. Obviously, I want more than either of those 2 pitching prospects in return for Grandal but each holds similar value (actually more) to the aforementioned compensatory pick we'd get if we let Yasmani become a free agent.
Also, clearing Grandal's salary would help towards getting us under the luxury tax threshold in order to avoid dropping 10 spots in the first round of the 2018 MLB Amateur Draft.