| Last Name | First Name | Number | Year | Company | Image | |
| Kaat | Jim | 117 | 1982 | Fleer | View Card | |
| Kaat | Jim | -- | ---- | Baseballs All Time Greats | View Card | |
| Kaline | Al | 75 | 2003 | Fleer Tradition | View Card | |
| Kalish | Ryan | 5 | 2008 | TriStar Projections | View Card | |
| Kalish | Ryan | 5 | 2008 | TriStar Projections | View Card | |
| Kamieniecki | Scott | 51 | 1991 | Donruss Rookies | View Card | |
| Kamieniecki | Scott | 66T | 1991 | Topps Traded | View Card | |
| Kapler | Gabe | 368 | 2000 | Topps | View Card | |
| Kapler | Gabe | 194 | 2001 | Fleer Focus | View Card | |
| Kapler | Gabe | 190 | 2004 | Fleer Tradition | View Card | |
| Kapler | Gabe | 19 | 2007 | Greenville Drive | View Card | |
| Kapler | Gabe | 19 | 2007 | Greenville Drive | View Card | |
| Karkovice | Ron | 334 | 1987 | Donruss | View Card | |
| Kasko | Eddie | 489 | 1970 | Topps | View Card | |
| Kasko | Eddie | 218 | 1972 | Topps | View Card | |
| Kasko | Eddie | 218 | 1972 | Topps | View Card | |
| Kasko | Eddie | 131 | 1973 | Topps | View Card | |
| Kearney | Bob | 61T | 1984 | Topps Traded | View Card | |
| Kearney | Bob | 73 | 1987 | O-Pee-Chee | View Card | |
| Kell | George | 69 | 1988 | Pacific Baseball Legends | View Card | |
| Kell | George | 96 | 1994 | UD Cooperstown Collection | View Card | |
| Kelly | Don | 47 | 2007 | Topps '52 | View Card | |
| Kelly | Don | 97 | 2007 | Turkey Red | View Card | |
| Kelly | Tom | 201 | 1991 | Topps | View Card | |
| Kemmerer | Russ | 56 | 1961 | Topps | View Card | |
| Kemp | Steve | 21 | 1978 | Topps | View Card | |
| Kemp | Steve | 21 | 1978 | Topps | View Card | |
| Kemp | Steve | 271 | 1982 | Fleer | View Card | |
| Kemp | Steve | U64 | 1985 | Fleer Update | View Card | |
| Kemp | Steve | 66T | 1985 | Topps Traded | View Card | |
| Kemp | Steve | 54T | 1982 | Topps Traded | View Card | |
| Kennedy | Terry | 455 | 1984 | Topps | View Card | |
| Kent | Jeff | 171 | 1999 | Fleer Tradition | View Card | |
| Kent | Jeff | 20 | 2008 | Topps Hertiage | View Card | |
| Kerfeld | Charlie | 6 | 1986 | Donruss Rookies | View Card | |
| Kerfeld | Charlie | 52T | 1986 | Topps Traded | View Card | |
| Kerfeld | Charlie | 31 | 1987 | Fleer Exciting Stars | View Card | |
| Kerfeld | Charlie | 145 | 1987 | O-Pee-Chee | View Card | |
| Kern | Jim | 89 | 1982 | Donruss | View Card | |
| Kern | Jim | 322 | 1982 | Fleer | View Card | |
| Kern | Jim | 56T | 1982 | Topps Traded | View Card | |
| Kessinger | Don | 159 | 1968 | Topps | View Card | |
| Kessinger | Don | 159 | 1968 | Topps | View Card | |
| Kessinger | Don | 69 | 1990 | Swell Baseball Greats | View Card | |
| Key | Jimmy | 62T | 1984 | Topps Traded | View Card | |
| Key | Jimmy | 244 | 1987 | Donruss | View Card | |
| Key | Jimmy | 68T | 1993 | Topps Traded | View Card | |
| Keylor | Cory | 37 | 2007 | Portland Sea Dogs | View Card | |
| Keylor | Cory | 37 | 2007 | Portland Sea Dogs | View Card | |
| Khoury | Ryan | 2 | 2008 | Portland Sea Dogs | View Card | |
| Khoury | Ryan | 2 | 2008 | Portland Sea Dogs | View Card | |
| Khoury | Ryan | 2 | 2008 | Portland Sea Dogs | View Card | |
| Khoury | Ryan | 2 | 2009 | Portland Sea Dogs | View Card | |
| Khoury | Ryan | 2 | 2009 | Portland Sea Dogs | View Card | |
| Khoury | Ryan | 2 | 2009 | Portland Sea Dogs | View Card | |
| Kiecker | Dana | U72 | 1990 | Fleer Update | View Card | |
| Kiecker | Dana | 28 | 1990 | Donruss Rookies | View Card | |
| Kiecker | Dana | 50T | 1990 | Topps Traded | View Card | |
| Kiecker | Dana | 163 | 1992 | Topps | View Card | |
| Kiecker | Dana | 507 | 1991 | Upper Deck | View Card | |
| Kiecker | Dana | 763 | 1991 | Topps | View Card | |
| Kiecker | Dana | U6 | 1991 | Fleer Ultra Update | View Card | |
| Kiecker | Dana | 10 | 1988 | CMC Pawtucket Red Sox | View Card | |
| Kiecker | Dana | 461 | 1988 | ProCards Pawtucket Red Sox | View Card | |
| Kiecker | Dana | 701 | 1989 | ProCards Pawtucket Red Sox | View Card | |
| Kiecker | Dana | 4 | 1989 | CMC Pawtucket Red Sox | View Card | |
| Killebrew | Harmon | 6 | 2001 | Post/Topps 500 HR Club | View Card | |
| King | Jeff | 202 | 2008 | Allen & Ginter | View Card | |
| Kingman | Dave | 23 | 1973 | Topps | View Card | |
| Kipper | Bob | 46 | 1986 | Donruss Rookies | View Card | |
| Kipper | Bob | 54T | 1986 | Topps Traded | View Card | |
| Kipper | Bob | 470 | 1990 | Fleer | View Card | |
| Kipper | Bob | 13 | 2010 | Portland Sea Dogs | View Card | |
| Kipper | Bob | -- | 2011 | Portland Sea Dogs | View Card | |
| Kittle | Ron | 58T | 1988 | Topps Traded | View Card | |
| Kittle | Ron | 58T | 1988 | Topps Traded | View Card | |
| Kittle | Ron | U20 | 1989 | Fleer Update | View Card | |
| Kittle | Ron | 62T | 1989 | Topps Traded | View Card | |
| Kittle | Ron | 538 | 1990 | Fleer | View Card | |
| Kobiak | Ted | 79 | 1968 | Topps | View Card | |
| Komminsk | Brad | U28 | 1989 | Fleer Update | View Card | |
| Komminsk | Brad | 53T | 1990 | Topps Traded | View Card | |
| Koslofski | Kevin | 63 | 1992 | Donruss Rookies | View Card | |
| Koslofski | Kevin | 158 | 1993 | Topps | View Card | |
| Kostro | Frank | 44 | 1968 | Topps | View Card | |
| Kostro | Frank | 44 | 1968 | Topps | View Card | |
| Kotchman | Casey | 324 | 2008 | Allen & Ginter | View Card | |
| Kotchman | Casey | 189 | 2009 | Allen & Ginter | View Card | |
| Kotchman | Casey | 419 | 2009 | O-Pee-Chee | View Card | |
| Kotsay | Mark | 39 | 2003 | Topps Hertiage | View Card | |
| Kotsay | Mark | 314 | 2008 | Topps Hertiage | View Card | |
| Kotsay | Mark | 314 | 2008 | Topps Hertiage | View Card | |
| Kottaras | George | -- | 2005 | Lake Elsinore Storm | View Card | |
| Kottaras | George | 13 | 2008 | Pawtucket Red Sox | View Card | |
| Kouzmanoff | Kevin | 10 | 2007 | Topps '52 | View Card | |
| Koza | Dave | 1 | ---- | Custom | View Card | |
| Koza | Dave | 2 | ---- | Custom | View Card | |
| Koza | Dave | 3 | ---- | Custom | View Card | |
| Krausse | Lew | 104 | 1963 | Topps | View Card | |
| Krausse | Lew | 566 | 1973 | Topps | View Card | |
| Kremers | Jim | U4 | 1990 | Fleer Update | View Card | |
| Krenchicki | Wayne | 65T | 1984 | Topps Traded | View Card | |
| Krenchicki | Wayne | 81 | 1987 | O-Pee-Chee | View Card | |
| Krueger | Bill | 70T | 1991 | Topps Traded | View Card | |
| Krueger | Bill | U52 | 1991 | Fleer Ultra Update | View Card | |
| Krueger | Bill | 61T | 1992 | Topps Traded | View Card | |
| Kruk | John | 235 | 1989 | Topps | View Card | |
| Krukow | Mike | 351 | 1982 | Donruss | View Card | |
| Krukow | Mike | 59T | 1982 | Topps Traded | View Card | |
| Kubiak | Ted | 79 | 1968 | Topps | View Card | |
| Kubiak | Ted | 79 | 1968 | Topps | View Card | |
| Kuiper | Duane | 60T | 1982 | Topps Traded | View Card | |
| Kuiper | Duane | 263 | 1983 | Fleer | View Card | |
| Kuntz | Rusty | 568 | 1984 | Fleer | View Card | |
| Kuntz | Rusty | 66T | 1984 | Topps Traded | View Card | |
| Kuntz | Rusty | U66 | 1984 | Fleer Update | View Card | |
| Kutcher | Randy | 64T | 1989 | Topps Traded | View Card | |
| Kutcher | Randy | 551 | 1990 | Score | View Card | |
| Kutcher | Randy | 676 | 1990 | Topps | View Card | |
| Kutzler | Jerry | 25 | 1990 | Donruss Rookies | View Card | |
