I visited each of your newsletter articles (453) available on your website and looked how frequently you mentioned teams and players. Each team/player only counted once per article, i.e., an article mentioning the Yankees twice only counted once.
To the results: you wrote about the Yankees and Rangers a lot, nearly three times as frequently as the Astros, Blue Jays, Marlins, and a few other teams. Your most commonly mentioned player was Cliff Lee (makes sense; he's been a big trade deadline / free agent / superstar pitcher over the sample period).
This analysis was done last fall, so it's slightly out of date. (That's on me, not Travis, as I've been sitting on this for a while.) But it's fun to share, and I hope you'll get a kick out of it. Thanks to Travis for doing the work.
Cliff Lee: 70 (15%)
Albert Pujols: 49 (10%)
Ron Washington: 44 (9%)
Derek Jeter: 42 (9%)
Buster Posey: 35 (7%)
Josh Hamilton: 33 (7%)
Ryan Howard: 33 (7%)
Mariano Rivera: 31 (6%)
Alex Rodriguez: 31 (6%)
Mike Napoli: 30 (6%)
Tim Lincecum: 29 (6%)
Adrian Gonzalez: 29 (6%)
Tony La Russa: 29 (6%)
Neftali Feliz: 29 (6%)
Carl Crawford: 29 (6%)
Ryan Braun: 28 (6%)
Chase Utley: 28 (6%)
David Price: 28 (6%)
Evan Longoria: 28 (6%)
Lance Berkman: 27 (5%)
Ian Kinsler: 27 (5%)
Michael Young: 27 (5%)
Mark Teixeira: 27 (5%)
Felix Hernandez: 27 (5%)
Jayson Werth: 27 (5%)
Jonathan Papelbon: 26 (5%)
Justin Verlander: 25 (5%)
Miguel Cabrera: 25 (5%)
Edwin Jackson: 25 (5%)
Stephen Strasburg: 24 (5%)
Aubrey Huff: 24 (5%)
Roy Oswalt: 24 (5%)
Bruce Bochy: 23 (5%)
Hunter Pence: 23 (5%)
Clayton Kershaw: 23 (5%)
Matt Kemp: 23 (5%)
Adrian Beltre: 23 (5%)
Jose Bautista: 23 (5%)
Jason Heyward: 22 (4%)
Joe Mauer: 22 (4%)
David Ortiz: 21 (4%)
Shane Victorino: 21 (4%)
Jorge Posada: 21 (4%)
Adam Dunn: 21 (4%)
Zack Greinke: 20 (4%)
Elvis Andrus: 20 (4%)
Kevin Youkilis: 20 (4%)
Charlie Manuel: 20 (4%)
Cole Hamels: 20 (4%)