| 251 | Ed Killian (Pitching) |  |
| 252 | Ed Killian (Portrait) |  |
| 253 | Frank King |  |
| 254 | Rube Kisinger (Kissinger) | |
| 255 | Red Kleinow (Boston) (Catching) |  |
| 256 | Red Kleinow (New York) (Catching) |
 |
| 257 | Red Kleinow (New York) (With Bat) |  |
| 258 | Johnny Kling |  |
| 259 | Otto Knabe |  |
| 260 | Jack Knight (Portrait) |  |
| 261 | Jack Knight (With Bat) |  |
| 262 | Ed Konetchy (Glove Above Head) |  |
| 263 | Ed Konetchy (Glove Near Ground) |  |
| 264 | Harry Krause (Pitching) |  |
| 265 | Harry Krause (Portrait) |  |
| 266 | Rube Kroh |  |
| 267 | Otto Kruger (Krueger) |  |
| 268 | James Lafitte |  |
| 269 | Nap Lajoie (Portrait) |
 |
| 270 | Nap Lajoie (Throwing) |  |
| 271 | Nap Lajoie (With Bat) |  |
| 272 | Joe Lake (New York) |  |
| 273 | Joe Lake (St. Louis) (Ball In Hand) |  |
| 275 | Joe Lake (St. Louis) (No Ball In Hand) |  |
| 276 | Frank La Porte |  |
| 277 | Arlie Latham |  |
| 278 | Bill Lattimore |  |
| 279 | Jimmy Lavender |  |
| 280 | Tommy Leach (Bending Over) |  |
| 281 | Tommy Leach (Portrait) |  |
| 282 | Lefty Leifield (Batting) |  |
| 283 | Lefty Leifield (Pitching) |  |
| 284 | Ed Lennox |  |
| 285 | Harry Lentz |  |
| 286 | Glenn Liebhardt |  |
| 287 | Vive Lindaman |  |
| 288 | Perry Lipe |  |
| 289 | Paddy Livingstone (Livingston) |
 |
| 290 | Hans Lobert |  |
| 291 | Harry Lord |  |
| 292 | Harry Lumley |  |
| 293 | Carl Lundgren (Chicago) |  |
| 294 | Carl Lundgren (Kansas City) |
|
| 295 | Nick Maddox |  |
| 296 | Sherry Magie | |
| 297 | Sherry Magee (portrait) | |
| 298 | Sherry Magee (With Bat) |  |
| 299 | Bill Malarkey |  |
| 300 | Billy Maloney |  |