| Date | Transaction |
| 02-28-1997 | Harry Clark has retired from football. |
| 04-28-1996 | The Las Vegas COIN have waived Harry Clark. |
| 08-07-1995 | The Las Vegas COIN have moved Harry Clark to the active roster. The Las Vegas COIN have moved Stu Benson to the inactive roster. |
| 08-07-1995 | The Las Vegas COIN have moved Tim Goodlow and Harry Clark to the inactive roster. |
| 09-05-1994 | The Las Vegas COIN have moved Harry Clark and Freddie Foth to the active roster. |
| 08-08-1994 | The Las Vegas COIN have moved Bob Tillman and Blaise Smith to the active roster. The Las Vegas COIN have moved Harry Clark and Freddie Foth to the inactive roster. |
| 09-06-1993 | The Las Vegas COIN have moved Carlo Frigo, Tim Goodlow, Bob McCrumbly, Cooper Sunter, and Harry Clark to the active roster. The Las Vegas COIN have moved Ron Ward and George Matthews to the inactive roster. |
| 08-09-1993 | The Las Vegas COIN have moved Danny Wohlabaugh, Dave Wilson, Joey Johnson, Carl Anderson, and George Goad to the active roster. The Las Vegas COIN have moved James "P" Sullivan, Harry Clark, Bob McCrumbly, and Ron Bedner to the inactive roster. |
| 01-03-1993 | Harry Clark of the Las Vegas COIN is injured with a hip contusion and is expected to be out for approximately 14 days. |
| 09-27-1992 | Harry Clark of the Las Vegas COIN is injured with a mild concussion and is expected to be out for approximately 9 days. |
| 09-13-1992 | Harry Clark of the Las Vegas COIN is injured with a hip contusion and is expected to be out for approximately 9 days. |
| 09-01-1991 | The Las Vegas COIN have moved Will Repko, Harry Clark, Carlo Frigo, Loren Lafitte, Tim Goodlow, and Cooper Sunter to the active roster. The Las Vegas COIN have moved Henry Hebron to the inactive roster. |
| 04-28-1991 | The Las Vegas COIN have moved Harry Clark to the inactive roster. |
| 11-19-1990 | The Las Vegas COIN have placed Harry Clark on the Injured Reserve list for the remainder of the season. |
| 11-18-1990 | Harry Clark of the Las Vegas COIN is injured with a complete MCL tear and is expected to be out for the rest of the season. |
| 09-03-1990 | The Las Vegas COIN have moved Cody Wood, Harry Clark, and Phil Kissell to the active roster. The Las Vegas COIN have moved Henry Hebron to the inactive roster. |
| 08-06-1990 | The Las Vegas COIN have moved Dennis Wynn, Johnnie Hugret, and Cedric Connor to the active roster. The Las Vegas COIN have moved Cody Wood, Harry Clark, Billy Zendejas, and Joe Tillman to the inactive roster. |
| 12-03-1989 | Harry Clark of the Las Vegas COIN is injured with a knee derangement and is expected to be out for approximately 26 days. |
| 05-03-1987 | Trade #62176 has been completed between the Las Vegas COIN and the Colorado Superstars. The Colorado Superstars receive Draft Pick - 1987 Round 3 (TB), Draft Pick - 1987 Round 3 (LAN), Draft Pick - 1987 Round 2 (LV) from the Las Vegas COIN in exchange for Harry Clark (DT). |
| 11-30-1986 | The Colorado Superstars have moved Joe Gloden, George Holloway, Harry Clark, George Christy, Fred Caleb, and Jamie Kadela to the active roster. The Colorado Superstars have moved Darren Mullen, A.B. Blackwell, Lamar Nickla, Scotty Gunn, and Melvin Maher to the inactive roster. |
| 11-16-1986 | The Colorado Superstars have moved Derrick Floyd, Rollie Mansfield, A.B. Blackwell, Melvin Maher, John Cotton, Jay Burleson, and Chuck Bech to the active roster. The Colorado Superstars have moved Fred Caleb, George Holloway, Jamal "baller" Johnson, Jamie Kadela, Matt "Speedy" Sanders, Harry Clark, Joe Gloden, Tim "the Cannon" Pilgrim, and George Christy to the inactive roster. |
| 11-02-1986 | The Colorado Superstars have placed Harry Clark on the trade block. |
| 09-07-1986 | The Colorado Superstars have moved Joe Gloden, George Holloway, Tim "the Cannon" Pilgrim, Harry Clark, George Christy, Jamie Kadela, Jamal "baller" Johnson, and Matt "Speedy" Sanders to the active roster. The Colorado Superstars have moved A.B. Blackwell, Dutch Adkins, John Smith, John Cotton, Scotty Gunn, Chuck Bech, and Terry Shields to the inactive roster. |
| 08-17-1986 | The Colorado Superstars have moved A.B. Blackwell, Dutch Adkins, Jon Scott, Mike Arrington, John Smith, Jimmy Beecham, John Cotton, Scotty Gunn, Melvin Maher, and Derrick Floyd to the active roster. The Colorado Superstars have moved Joe Gloden, Tim "the Cannon" Pilgrim, Harry Heppner, Harry Clark, Dick Jenkins, Drew Chamberlain, Jamie Kadela, Jamal "baller" Johnson, Matt "Speedy" Sanders, and Alonzo Moss to the inactive roster. |
| 08-06-1984 | The Colorado Dimebags have moved Darryl Goff, Harry Clark, and Scott Beasley to the active roster. The Colorado Dimebags have moved Derrick Floyd, Jamal Johnson, Chuck Grossman, and Mike Gantt to the inactive roster. |
Defensive Tackle