| Date | Transaction |
| 02-28-1992 | Walt O'Neil has retired from football. |
| 09-04-1989 | The Las Vegas God have waived Walt O'Neil. |
| 09-12-1988 | The Las Vegas God have moved Walt O'Neil to the active roster. The Las Vegas God have moved Lou Weiss to the inactive roster. |
| 09-12-1988 | The Las Vegas God have acquired Walt O'Neil from the waiver wire. |
| 09-04-1988 | The New England Soviets have waived Walt O'Neil. |
| 09-04-1988 | The New England Soviets have moved Rick Mitchell, Rob Lyle, Tony Jones, Theotis Modzelewski, Pat Songy, Frank Nathan, and Joe McKoy to the active roster. The New England Soviets have moved Louis Lefear, Michael Ingram, Walt O'Neil, Zeke McGill, Alex McGrew, Lew Burris, and Strudel "Von" Velcrohands to the inactive roster. |
| 08-21-1988 | The New England Soviets have placed Walt O'Neil on the trade block. |
| 08-08-1988 | The New England Soviets have moved Ken Kyles, Alex McGrew, Louis Lefear, Van Hubbard, Michael Ingram, Walt O'Neil, Ed Thomas, Bob Vance, and Benny Morris to the active roster. The New England Soviets have moved Frank Nathan, Jeff Aldridge, Bill McKalip, Jamie Crumpler, Don Papale, Rob Lyle, Rick Mitchell, Craig Smith, and Theotis Modzelewski to the inactive roster. |
| 01-03-1988 | The New England Soviets have moved Rick Mitchell to the active roster. The New England Soviets have moved Walt O'Neil to the inactive roster. |
| 11-29-1987 | The New England Soviets have moved Walt O'Neil to the active roster. The New England Soviets have moved Rick Mitchell to the inactive roster. |
| 11-29-1987 | The New England Soviets have acquired Walt O'Neil from the waiver wire. |
| 09-20-1987 | The Pittsburgh Ironheads have automatically waived Walt O'Neil to comply with the 53-man roster limit. |
| 10-06-1986 | The Pittsburgh Ironheads have moved Pete Campbell and Larry Martin to the active roster. The Pittsburgh Ironheads have moved Steve Green and Walt O'Neil to the inactive roster. |
| 09-29-1986 | The Pittsburgh Ironheads have moved Walt O'Neil and Mark Farr to the active roster. The Pittsburgh Ironheads have moved Len Arndt and Larry Martin to the inactive roster. |
| 09-21-1986 | The Pittsburgh Ironheads have moved Spencer Belin to the active roster. The Pittsburgh Ironheads have moved Walt O'Neil to the inactive roster. |
| 09-01-1985 | Walt O'Neil of the Pittsburgh Ironheads is injured with a quadricep contusion and is expected to be out for approximately 6 days. |
| 08-05-1985 | The Pittsburgh Ironheads have moved Jim Wolski, Rick Marelli, George Marrone, George Outlaw, Walt O'Neil, and Art Dunek to the active roster. The Pittsburgh Ironheads have moved Steve Green, Mike Cronin, Ricky Dawkins, Jim Bruce, Mike Seurer, and John Harris to the inactive roster. |
| 09-17-1984 | The Pittsburgh Ironheads have acquired Walt O'Neil from the waiver wire. |
| 09-16-1984 | The Edmonton Chimeras have automatically waived Walt O'Neil to comply with the 53-man roster limit. |
| 09-09-1984 | The Edmonton Chimeras have moved Walt O'Neil to the inactive roster. |
| 08-20-1984 | The Edmonton Chimeras have moved Walt O'Neil and Frank Grace to the active roster. The Edmonton Chimeras have moved Terry McGill, Randy Guson, and Tom Burk to the inactive roster. |
| 12-26-1983 | The Edmonton Chimeras have moved Terry McGill to the active roster. The Edmonton Chimeras have moved Walt O'Neil to the inactive roster. |
| 12-25-1983 | Walt O'Neil of the Edmonton Chimeras is injured with an ankle ligament sprain and is expected to be out for approximately 19 days. |
| 10-24-1983 | The Edmonton Chimeras have moved Marc Walker and Walt O'Neil to the active roster. The Edmonton Chimeras have moved Scott Flowers and Joe Duckens to the inactive roster. |
| 09-26-1983 | The Edmonton Chimeras have acquired Walt O'Neil from the waiver wire. |
| 09-05-1983 | The Miami Monsoon have waived Walt O'Neil. |
| 08-15-1983 | The Miami Monsoon have acquired Walt O'Neil from the waiver wire. |
Running Back