Dallas traded defensive tackle Jim "Rocky" Colvin to New York…

The documented trade is a clean player-for-pick exchange. Dallas' official draft history identifies the Cowboys' 1968 fourth-round selection at No. 97 as a choice acquired from the New York Giants for Jim Colvin. Pro Sports Transactions independently lists the October 11, 1967 transaction as Colvin to New York for the 1968 fourth-round pick that became John Douglas. The legacy row's duplicate undisclosed-consideration placeholders have no support in those records and are removed.

Colvin gave New York immediate but short-lived defensive-line help. NFL records show him appearing in eight regular-season games for the Giants in 1967, with four starts. He had spent the previous three seasons with Dallas after beginning his career in Baltimore. Contemporary and later career records indicate that 1967 was his final NFL season, so the Giants did not receive multi-year value. Still, eight games and four starts are real realized production from the player New York obtained.

Dallas used the acquired No. 97 pick on Missouri linebacker John Douglas. The Cowboys' official draft ledger explicitly labels that selection as the Giants-derived choice from the Colvin deal. Douglas did not produce a regular-season game for Dallas. Pro Football Archives records him on the Cowboys' military reserve list in August 1968, then shows Dallas releasing him on September 15, 1970. The Giants claimed him the next day. Because Douglas never appeared in a Cowboys regular-season game, his later career cannot be counted as realized Dallas value from the trade.

Douglas' later Giants tenure is an especially important accounting trap. After New York claimed him on waivers in 1970, he played 56 regular-season games for the Giants through 1973 and started 25. That later production belongs to the Giants' waiver acquisition, not to Dallas' return for Colvin. TradeVerdicts therefore credits Dallas for obtaining and exercising a fourth-round selection but gives the Cowboys no on-field production from the player selected with it.

The hindsight edge goes narrowly to New York. Colvin's eight games and four starts were modest, and the Giants surrendered a fourth-round asset that could have become useful. But Dallas ultimately received zero regular-season games from Douglas before releasing him, while New York did receive a half-season of starting-caliber depth from Colvin. A C+ for the Giants and D+ for Dallas reflects that limited but real difference without overstating either side's outcome.