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If you're sensing that it's been a busy off-season for the Buffalo Bills, you're right: the team has added a whopping 33 new players this off-season as the transition to Doug Marrone and his new coaching staff continues. 19 players have made their exits, as well.
A reader going by "Drew R" (we're assuming it's not Rosenhaus) has asked for a post showing all of the transactions that the Bills have made over the past few months. We've been tracking each move in far more detail in this StoryStream, but if you're looking for the nuts and bolts - i.e. a list of the additions and subtractions this spring - this post is for you.
Additions
| Player | Pos. | 2012 team | Acquired via |
| EJ Manuel | QB | Florida State | 2013 NFL Draft - Round 1 |
| Kevin Kolb | QB | Cardinals | Free agent |
| Jeff Tuel | QB | Washington State | Undrafted free agent |
| Kendall Gaskins | RB | Richmond | Undrafted free agent |
| Drew Smith | RB | Albany | Undrafted free agent |
| Frank Summers | FB | N/A | Free agent |
| Robert Woods | WR | USC | 2013 NFL Draft - Round 2 |
| Marquise Goodwin | WR | Texas | 2013 NFL Draft - Round 3 |
| Da'Rick Rogers | WR | Tennessee Tech | Undrafted free agent |
| Brandon Kaufman | WR | Eastern Washington | Undrafted free agent |
| Kevin Norrell | WR | Stony Brook | Undrafted free agent |
| Chris Gragg | TE | Arkansas | 2013 NFL Draft - Round 7 |
| Zack Chibane | OG | Syracuse | Undrafted free agent |
| Ryan Turnley | C | Pittsburgh | Undrafted free agent |
| Alan Branch | DL | Seahawks | Free agent |
| Izaan Cross | DL | Georgia Tech | Undrafted free agent |
| Aaron Tipoti | DL | California | Undrafted free agent |
| Manny Lawson | OLB | Bengals | Free agent |
| Jerry Hughes | OLB | Colts | Trade with Indianapolis |
| Kourtnei Brown | OLB | N/A | Free agent |
| Jamie Blatnick | OLB | N/A | Free agent |
| Keith Pough | OLB | Howard | Undrafted free agent |
| Kiko Alonso | ILB | Oregon | 2013 NFL Draft - Round 2 |
| Marcus Dowtin | ILB | Eagles | Waiver claim |
| Nickell Robey | CB | USC | Undrafted free agent |
| Vernon Kearney | CB | Lane | Undrafted free agent |
| Jumal Rolle | CB | Catawba | Undrafted free agent |
| Kip Edwards | CB | Missouri | Undrafted free agent |
| Duke Williams | S | Nevada | 2013 NFL Draft - Round 4 |
| Jonathan Meeks | S | Clemson | 2013 NFL Draft - Round 5 |
| Jordan Dangerfield | S | Towson | Undrafted free agent |
| Dustin Hopkins | K | Florida State | 2013 NFL Draft - Round 6 |
| Brian Stahovich | P | N/A | Free agent |
Subtractions
| Player | Pos. | Departure | 2013 team |
| Ryan Fitzpatrick | QB | Released | Titans |
| Tyler Thigpen | QB | Free agency | unsigned |
| Corey McIntyre | FB | Free agency | unsigned |
| Donald Jones | WR | Free agency | Patriots |
| David Nelson | WR | Free agency | Browns |
| Ruvell Martin | WR | Free agency | unsigned |
| Joe Sawyer | TE | Released | unsigned |
| Adam Grant | OT | Released | unsigned |
| Andy Levitre | OG | Free agency | Titans |
| Chad Rinehart | OG | Free agency | Chargers |
| Kyle Moore | DE | Free agency | Bears |
| Chris Kelsay | DE | Retired | N/A |
| Shawne Merriman | DE | Retired | N/A |
| Spencer Johnson | DT | Free agency | unsigned |
| Nick Barnett | ILB | Released | unsigned |
| Kelvin Sheppard | ILB | Traded | Colts |
| Kirk Morrison | ILB | Free agency | unsigned |
| Terrence McGee | CB | Released | unsigned |
| George Wilson | S | Released | Titans |