| 9.3.1958 | Preliminary Boca Raton [CM+DM+EM+FM+GM] | 183 | | John Cuevas | | 4th |
| 9.3.1958 | SCCA Regional Boca Raton [CM+DM+EM+FM+GM+BP+CP+DP] | 183 | | John Cuevas | | ?th |
| 22.3.1958 | 12 h Sebring | 41 | | Schell / Seidel | Porsche K.G. | 3rd |
| 22.3.1958 | 12 h Sebring | 44 | #0111 | Bunker / de Beaufort | Art's Sports Motors | DNF |
| 22.3.1958 | 12 h Sebring | 45 | #0104 | Miles / Kunstle | Jean-Pierre Kunstle | DNF |
| 22.3.1958 | 12 h Sebring | 46 | | Wallace / Holbert / Hudson | Marshall Motors | 25th |
| 22.3.1958 | 12 h Sebring | 74 | | Scott / Bott | Norman J. Scott Jr. | 39th |
| 22.3.1958 | 12 h Sebring | 75 | | Underwood / Cunningham / Boss | Alfred Momo | DNS |
| 23.3.1958 | SCCA Regional Stockton [S1.5] | 12 | | Eldon Beagle | | 1st |
| 23.3.1958 | SCCA Regional Stockton [S+1.5] | 12 | | Eldon Beagle | | 1st |
| 13.4.1958 | GP Avandaro | 9 | | Ricardo Rodriguez | | 1st |
| 13.4.1958 | SCCA Regional Palm Springs [FM+GM+HM] | 88 | | Jack McAfee | Stan Sugarman | 1st |
| 13.4.1958 | SCCA Regional Palm Springs [FM+GM+HM] | 112 | | Eldon Beagle | Eldon Beagle | 6th |
| 13.4.1958 | SCCA Regional Palm Springs [FM+GM+HM] | 118 | #0104 | Jean Pierre Kunstle | Jean-Pierre Kunstle | DNF |
| 13.4.1958 | GP Avandaro | | | Ken Miles | | 2nd |
| 20.4.1958 | San Salvador | 9 | | Ricardo Rodriguez | Ricardo Rodríguez | DNF |
| 20.4.1958 | Preliminary Galveston [FM+GM+HM] | 62 | | Bobby Burns | | 1st |
| 20.4.1958 | SCCA Regional Galveston [Modified] | 62 | | Bobby Burns | | 5th |
| 20.4.1958 | SCCA National Marlboro [BM+CM+DM+EM+FM] | 140 | | Bob Holbert | | 2nd |
| 20.4.1958 | SCCA National Marlboro [BM+CM+DM+EM+FM] | 741 | | Don Sesslar | | 3rd |
| 20.4.1958 | Marlboro [Handicap 1st Heat] | 741 | | Don Sesslar | | 4th |
| 27.4.1958 | SCCA Regional Lime Rock [CM+DM+EM+FM+GM] | 23 | #0139 | Denise McCluggage | | 3rd |
| 27.4.1958 | Aguascalientes | 42 | | Ricardo Rodriguez | | 1st |
| 27.4.1958 | SCCA Regional Lime Rock [CM+DM+EM+FM+GM] | 61 | | Briggs Cunningham | | 6th |
| 27.4.1958 | Preliminary Louisville [BM+CM+DM+EM+FM+GM] | 95 | | Ed Crawford | | 2nd |
| 27.4.1958 | SCCA Regional Louisville [BM+CM+DM+EM+FM+GM] | 95 | | Ed Crawford | | 1st |
| 27.4.1958 | Preliminary Louisville [BM+CM+DM+EM+FM+GM] | 174 | | Don Sesslar | | 3rd |
| 27.4.1958 | SCCA Regional Louisville [BM+CM+DM+EM+FM+GM] | 174 | | Don Sesslar | | 2nd |
| 4.5.1958 | Preliminary Virginia [BP+CP+BM+CM+DM+EM+FM] | 23 | #0139 | Denise McCluggage | | DNA |
| 4.5.1958 | SCCA National Virginia [BM+CM+DM+EM+FM+BP+CP] | 23 | #0139 | Denise McCluggage | | DNA |
| 4.5.1958 | Preliminary Virginia [BP+CP+BM+CM+DM+EM+FM] | 74 | | Don Sesslar | | 3rd |
| 4.5.1958 | SCCA National Virginia [BM+CM+DM+EM+FM+BP+CP] | 74 | | Don Sesslar | | ?th |
| 4.5.1958 | SCCA National Virginia [BM+CM+DM+EM+FM+BP+CP] | 127 | | Roy Schecter | | ?th |
| 4.5.1958 | Preliminary Virginia [BP+CP+BM+CM+DM+EM+FM] | 127 | | Roy Schecter | | DNA |
| 4.5.1958 | Preliminary Virginia [BP+CP+BM+CM+DM+EM+FM] | 140 | | Bob Holbert | | DNA |
| 4.5.1958 | SCCA National Virginia [BM+CM+DM+EM+FM+BP+CP] | 140 | | Bob Holbert | | ?th |
| 4.5.1958 | Sidar Airfield | | | Ricardo Rodriguez | | 1st |
| 11.5.1958 | SCCA Regional Tracy [CM+DM+EM] | 12 | | Eldon Beagle | | 4th |
| 11.5.1958 | SCCA Regional Tracy [FM+GM+HM] | 12 | | Eldon Beagle | | 2nd |
| 11.5.1958 | Targa Florio | 80 | | Scarlatti / Barth | Porsche KG | DNF |
| 11.5.1958 | SCCA Regional Tracy [FM+GM+HM] | 188 | | Jack McAfee | Stan Sugarman | 1st |
| 11.5.1958 | SCCA Regional Tracy [CM+DM+EM] | 188 | | Jack McAfee | Stan Sugarman | 1st |
| 15.5.1958 | Aspern [S1.5] | 17 | | Carel Godin de Beaufort | Ecurie Maarsbergen | DNF |
| 15.5.1958 | Aspern [S1.5] | 18 | | Heini Walter | Heinrich Walter | DNS |
| 15.5.1958 | Aspern [S1.5] | 19 | | Christian Heins | Bino Heins | raced |
| 15.5.1958 | Aspern [S1.5] | 25 | | Heinz Schiller | Ecurie Léman | raced |
| 18.5.1958 | SCCA National Cumberland [EM+FM] | 23 | #0139 | Denise McCluggage | Scuderia Skiddoo | ?th |
| 18.5.1958 | Preliminary Cumberland [Ladies] | 23 | #0139 | Denise McCluggage | Scuderia Skiddoo | 1st |
| 18.5.1958 | SCCA National Cumberland [EM+FM] | 27 | | Roy Schecter | Ray R. Schechter | DNA |
| 18.5.1958 | SCCA National Cumberland [EM+FM] | 74 | | Don Sesslar | Cyrus L. Fulton | 1st |
| 18.5.1958 | SCCA National Cumberland [BM+CM+DM] | 74 | | Don Sesslar | Cyrus L. Fulton | 3rd |
| 18.5.1958 | SCCA National Cumberland [EM+FM] | | | Bob Holbert | | ?th |
| 31.5.1958 | Preliminary Santa Barbara [Modified 1.5] | 12 | | Eldon Beagle | Eldon Beagle | DNA |
| 31.5.1958 | Preliminary Santa Barbara [Modified 1.5] | 50 | | Ken Miles | Zipper Estes | 2nd |
| 31.5.1958 | SCCA National Bridgehampton [FM+GM] | 63 | | Briggs Cunningham | Briggs Cunningham | 6th |
| 31.5.1958 | SCCA National Bridgehampton [FM+GM] | 77 | | Vic Meinhardt | | 3rd |
| 31.5.1958 | SCCA National Bridgehampton [FM+GM] | 83 | | Dick Thompson | | 2nd |
| 31.5.1958 | Preliminary Santa Barbara [Modified 1.5] | 88 | | Jack McAfee | Stanley Sugarman | 1st |
| 31.5.1958 | Preliminary La Junta [BM+CM+DM+EM+FM+GM] | 119 | | Donald Berlin | | 5th |
| 31.5.1958 | SCCA National Bridgehampton [FM+GM] | 140 | | Bob Holbert | | 1st |
| 31.5.1958 | Preliminary La Junta [BM+CM+DM+EM+FM+GM] | | | Bob Donner | | 3rd |
| 1.6.1958 | Santa Barbara [FM+GM+HM] | 12 | | Eldon Beagle | Eldon Beagle | 4th |
| 1.6.1958 | 1000 km Nürburgring | 22T | #0145 | von Frankenberg / de Beaufort / Barth | Porsche KG | 6th |
| 1.6.1958 | 1000 km Nürburgring | 31 | | Bunker / Schiller | Ecurie Maarsbergen | DNF |
| 1.6.1958 | Santa Barbara [FM+GM+HM] | 50 | | Ken Miles | Zipper Estes | 2nd |
| 1.6.1958 | SCCA National Bridgehampton [BM+CM+DM+EM+FM] | 83 | | Dick Thompson | | 8th |
| 1.6.1958 | Santa Barbara [FM+GM+HM] | 88 | | Jack McAfee | Stanley Sugarman | 1st |
| 1.6.1958 | SCCA Regional La Junta [FM+GM+HM+EP+FP+GP] | 119 | | Donald Berlin | | 3rd |
| 1.6.1958 | SCCA National Bridgehampton [BM+CM+DM+EM+FM] | 140 | | Bob Holbert | | 5th |
| 1.6.1958 | SCCA Regional La Junta [FM+GM+HM+EP+FP+GP] | | | Bob Donner | | DNS |
| 1.6.1958 | SCCA Regional La Junta [BM+CM+DM+EM+BP+CP+DP] | | | Bob Donner | | DNF |
| 1.6.1958 | 1000 km Nürburgring | | | Knippel / Merkel | Hans Knippel | DNA |
| 2.6.1958 | Roskilde Ring [S1.5] | | | Julius Voigt-Nielsen | | ?th |
| 7.6.1958 | Preliminary Eagle Mountain [Novice] | | | Charles Fagg | | 2nd |
| 8.6.1958 | SCCA Regional Thompson [BM+CM+EM+FM] | 61 | | Forno | Briggs Cunningham | 3rd |
| 8.6.1958 | SCCA Regional Thompson [BM+CM+EM+FM] | 123 | #0139 | Denise McCluggage | | 5th |
| 8.6.1958 | SCCA Regional Lawrenceville [BM+CM+DM+EM+FM+GM] | 174 | | Don Sesslar | | ?th |
| 8.6.1958 | Preliminary Lawrenceville [BM+CM+DM+EM+FM+GM] | 174 | | Don Sesslar | | ?th |
| 14.6.1958 | SCCA National Lime Rock [FM+GM] | 23 | #0139 | Denise McCluggage | | 2nd |
| 14.6.1958 | SCCA National Lime Rock [FM+GM] | 71 | | Vic Meinhardt | | 4th |
| 14.6.1958 | SCCA National Lime Rock [FM+GM] | 140 | | Bob Holbert | | 1st |
| 15.6.1958 | SCCA Regional Laguna Seca [FM+GM+FIII] | 12 | | Eldon Beagle | | 12th |
| 15.6.1958 | SCCA National Lime Rock [BM+CM+DM+EM+FM] | 23 | #0139 | Denise McCluggage | Briggs Cunningham | 8th |
| 15.6.1958 | SCCA Regional Laguna Seca [FM+GM+FIII] | 88 | | Jack McAfee | | 1st |
| 15.6.1958 | SCCA National Lime Rock [BM+CM+DM+EM+FM] | 140 | | Bob Holbert | | 3rd |
| 15.6.1958 | Opatija [S2.0] | | #0137 | Milivoj Bozic | | DNF |
| 15.6.1958 | SCCA Regional Laguna Seca [FM+GM+FIII] | | | Ruth Levy | John Edgar | DNA |
| 22.6.1958 | SCCA National Road America [EM+FM+GM] | 27 | | Ernie Erickson | Ernie Erickson | DNA |
| 22.6.1958 | 24 h Le Mans | 32 | | | Ed Hugus | DNA |
| 22.6.1958 | 24 h Le Mans | 32 | #0145 | de Beaufort / Linge | Carel Godin de Beaufort | 5th |
| 22.6.1958 | 24 h Le Mans | 33 | | | Christian Goethals | DNA |
| 22.6.1958 | 24 h Le Mans | 34 | #0142 | Kerguen / "Franc" | Jean-Paul Colas | 10th |
| 22.6.1958 | 24 h Le Mans | 59 | | Schiller / Tot | Leman | DNS |
| 22.6.1958 | SCCA National Road America [EM+FM+GM] | 74 | | Don Sesslar | Cyrus L. Fulton | 1st |
| 28.6.1958 | Preliminary Riverside [Modified 1.5] | 50 | | Ken Miles | | 3rd |
| 28.6.1958 | Preliminary Riverside [Modified 1.5] | 88 | #0081 | Jack McAfee | | 1st |
| 29.6.1958 | Riverside [FM+GM+HM] | 50 | | Ken Miles | | 2nd |
| 29.6.1958 | Riverside [FM+GM+HM] | 88 | #0081 | Jack McAfee | | 1st |
| 5.7.1958 | SCCA National Lime Rock [CM+DM+EM+FM] | 77 | | Vic Meinhardt | | 7th |
| 5.7.1958 | SCCA National Lime Rock [CM+DM+EM+FM] | 140 | | Bob Holbert | | 5th |