Bulldogs trade block

Looking to make some trades. I would like to find another OF for sure, and maybe improve my middle infielders. Always looking for pitching upgrades as well. I'll divide my guys into three tiers so you can know where I stand on them.

Tier 1 - Pretty much Untouchable
Manny Machado (BAL-3B) $5 million
Matt Harvey (NYM-SP) $4.325 million
Nomar Mazara (TEX-OF)

Tier 2 - Not looking to move, but not untouchable
Buster Posey (SF-C/1B) $20 million
Javier Baez (CHC-2B) $.5 million
Starling Marte (PIT-OF) $3 million (Pretty close to tier 1)
Carlos Rodon (CHW-SP) $.5 million 
Zach Britton (BAL-RP) $6.75 million
Lance McCullers (HOU-SP) $.5 million
Kevin Gausman (BAL-SP) $.5 million
Daniel Norris (DET-SP) $.5 million
Robert Stephenson (CIN-RHP)
Brett Phillips (MIL-OF)
Amir Garrett (CIN-LHP)
Luis Ortiz (TEX-RHP)
Clint Frazier (CLE-OF)
Ian Happ (CHC-OF)

Tier 3 - On the Block
Yan Gomes (CLE-C) $2.5 million
Brandon Crawford (SF-SS) $5.8 million
Will Myers (SD-OF) $.5 million
Prince Fielder (TEX-DH) $24 million
Will Smith (MIL-RP) $1.475 million
Darren O'Day (BAL-RP) $6 million
Alex Cobb (TB-SP) $4 million
Robbie Ray (ARI-SP) $.5 million
Keone Kela (TEX-RP) $.5 million
Adam Conley (MIA-SP) $.5 million
Chris Bassitt (OAK-SP) $.5 million
Derek Fisher (HOU-OF)
Nolan Watson (KC-RHP)
Willie Calhoun (LAD-2B)
Justin Maese (TOR-RHP)


Traded
Zack Greinke (ARZ-SP) $31 million
Grant Holmes (LAD-RHP)
Gleyber Torres (CHC-SS)