| 27.6.1958 | SCCA Regional Watkins Glen [FP+GP+Sedan] | 5 | A | Henry Van Deusen | Henry Van Deusen | DNA |
| 27.6.1958 | Preliminary Watkins Glen [MG] | 5 | A | Henry Van Deusen | Henry Van Deusen | 3rd |
| 27.6.1958 | SCCA Regional Watkins Glen [FP+GP+Sedan] | 20 | A | Robert Botkin | Robert F. Botkin | DNA |
| 27.6.1958 | SCCA Regional Watkins Glen [FP+GP+Sedan] | 21 | TD | Van Conway | Van Conway | DNA |
| 27.6.1958 | SCCA Regional Watkins Glen [FP+GP+Sedan] | 26 | A | Fred Reynolds | Fred Reynolds | DNA |
| 27.6.1958 | Preliminary Watkins Glen [MG] | 26 | A | Fred Reynolds | Fred Reynolds | DNA |
| 27.6.1958 | Preliminary Watkins Glen [MG] | 38 | A | Sherman Decker | Sherman Decker | 1st |
| 27.6.1958 | SCCA Regional Watkins Glen [FP+GP+Sedan] | 38 | A | Sherman Decker | Sherman L. Decker | DNA |
| 27.6.1958 | SCCA Regional Watkins Glen [FP+GP+Sedan] | 42 | A | Monty Allen | Monty Allen | DNA |
| 27.6.1958 | Preliminary Watkins Glen [MG] | 50 | A | Edward Richard, Jr. | Ed Richard Jr. | 8th |
| 27.6.1958 | Preliminary Watkins Glen [MG] | 51 | A | Ronald Ference | Ronald Ference | DNA |
| 27.6.1958 | SCCA Regional Watkins Glen [FP+GP+Sedan] | 51 | A | Ronald Ference | Ronald F. Ference | DNA |
| 27.6.1958 | SCCA Regional Watkins Glen [FP+GP+Sedan] | 56 | A | Jack Paveling | Jack Paveling | 14th |
| 27.6.1958 | Preliminary Watkins Glen [MG] | 59 | A | Johnny Boyd | Johnny Boyd | DNA |
| 27.6.1958 | SCCA Regional Watkins Glen [FP+GP+Sedan] | 59 | A | Johnny Boyd | Johnny Boyd | DNA |
| 27.6.1958 | Preliminary Watkins Glen [MG] | 60 | TC | Eric O. Pettit | Eric Pettit | 17th |
| 27.6.1958 | Preliminary Watkins Glen [MG] | 67 | TF | Edgar Vollaro | Ecurio-Torque | 13th |
| 27.6.1958 | SCCA Regional Watkins Glen [FP+GP+Sedan] | 67 | TF | Edgar Vollaro | Ecurio Torque | 21st |
| 27.6.1958 | Preliminary Watkins Glen [MG] | 72 | TC | Charles Henry | Charles Henry | 12th |
| 27.6.1958 | Preliminary Watkins Glen [MG] | 80 | A | Dennis Miller | | 7th |
| 27.6.1958 | SCCA Regional Watkins Glen [FP+GP+Sedan] | 80 | A | Dennis Miller | | 16th |
| 27.6.1958 | Preliminary Watkins Glen [MG] | 83 | A | Jack Terhaar | Jack TerHaar | 5th |
| 27.6.1958 | Preliminary Watkins Glen [MG] | 86 | A | Art Smith | Arthur Smith, Jr. | 9th |
| 27.6.1958 | Preliminary Watkins Glen [MG] | 88 | TD | Albert Foster | | 16th |
| 27.6.1958 | Preliminary Watkins Glen [MG] | 95 | TD | John Voss | John A. Voss | 15th |
| 27.6.1958 | Preliminary Watkins Glen [MG] | 97 | TF | John Tame | John S. Tame | DNA |
| 27.6.1958 | SCCA Regional Watkins Glen [FP+GP+Sedan] | 98 | A | Richard A. Smith | Richard A. Smith | DNA |
| 27.6.1958 | SCCA Regional Watkins Glen [FP+GP+Sedan] | 212 | A | Homer Dasey | Homer Dasey | DNA |
| 27.6.1958 | Preliminary Watkins Glen [MG] | 212 | A | Laura Dasey | Homer Daisey | 11th |
| 28.6.1958 | Preliminary Riverside [MG] | 0 | TF | Jim Honeter | Long Beach MG Car Club Racing Team | ?th |
| 28.6.1958 | Preliminary Riverside [MG] | 67 | A | Elliot Forbes-Robinson | Ken Swanson | 3rd |
| 28.6.1958 | Preliminary Riverside [MG] | 79 | A | Vernon Stephan | | DNF |
| 28.6.1958 | Preliminary Riverside [MG] | 89 | A | Ray Pickering | Ray Pickering | 2nd |
| 28.6.1958 | Preliminary Riverside [MG] | 101 | TF | Jack Bleak | | ?th |
| 28.6.1958 | Preliminary Riverside [MG] | 128 | A | Robert Scurlock | | 1st |
| 28.6.1958 | Preliminary Riverside [MG] | | TD | Ken Roehr | | DNF |
| 28.6.1958 | Preliminary Riverside [MG] | | A | Loyal Davies | Long Beach MG Car Club Racing Team | ?th |
| 29.6.1958 | Riverside [FP+GP] | 0 | TF | Jim Honeter | Long Beach MG Car Club Racing Team | 16th |
| 29.6.1958 | Riverside [FP+GP] | 4 | A | Mark Sanders | | DNF |
| 29.6.1958 | Riverside [FP+GP] | 15 | A | Harold Greenberg | | DNF |
| 29.6.1958 | Riverside [FP+GP] | 22 | A | Charles Berg | | DNF |
| 29.6.1958 | Riverside [FM+GM+HM] | 25 | Special | Jim Chaffee | | DNF |
| 29.6.1958 | WJC Charterhall [S1.5] | 27 | A | Jack Richmond | J. M. Richmond | DNA |
| 29.6.1958 | Riverside [FP+GP] | 61 | TD | Phil Carter | | 14th |
| 29.6.1958 | Riverside [FP+GP] | 64 | A | Richard Quint | | 11th |
| 29.6.1958 | Riverside [FP+GP] | 67 | A | Elliot Forbes-Robinson | Long Beach MG Car Club Racing Team (Ken Swanson) | 8th |
| 29.6.1958 | Riverside [Ladies] | 89 | A | Ruth Doushkess | Ray Pickering | DNS |
| 29.6.1958 | Riverside [FP+GP] | 89 | A | Ray Pickering | | DNF |
| 29.6.1958 | Riverside [FP+GP] | 100 | A | Art Greycloud | | 13th |
| 29.6.1958 | Riverside [FP+GP] | 101 | TF | Jack Bleak | | 15th |
| 29.6.1958 | Riverside [FP+GP] | 125 | A | Jim Chaffee | | DNS |
| 29.6.1958 | Riverside [FP+GP] | 128 | A | Robert Scurlock | | 7th |
| 29.6.1958 | Riverside [FP+GP] | 237 | TD Mk II | Sam Taylor | | 12th |
| 29.6.1958 | St. Eugene [S1.6] | | A Coupe | Ross de St. Croix | | 2nd |
| 4.7.1958 | Orange County [Ladies] | | A | Barbara Scott | | 2nd |
| 4.7.1958 | Orange County [Production 1.6] | | A | Jim Nieland | | 3rd |
| 4.7.1958 | Orange County [S1.5] | | Special | Barton Haskell | | 2nd |
| 5.7.1958 | LASC Green Acres [MG] | 1 | A | Harry Entwistle | Gulliver Motors | 3rd |
| 5.7.1958 | LASC Green Acres [MG] | 2 | A | Bryant Jones | Bryant Jones | 13th |
| 5.7.1958 | LASC Green Acres [MG] | 11 | A | Emrys Jones | Emrys Jones | 6th |
| 5.7.1958 | LASC Green Acres [MG] | 23 | A | Don Chambers | J. D. Chambers | 4th |
| 5.7.1958 | Preliminary Vaca Valley [Alfa+MGA+356] | 24 | A | Bob Ellis | Robert Ellis | DNA |
| 5.7.1958 | Novice Vaca Valley [Production 1.6] | 25 | A Coupe | Elroy Anderson | Juanita Anderson | DNA |
| 5.7.1958 | Novice Vaca Valley [Modified] | 28 | TD | Jack Anderson | Jack Anderson | DNA |
| 5.7.1958 | LASC Green Acres [MG] | 29 | A | Thomas Clifton | Thomas D. Clifton | 9th |
| 5.7.1958 | Novice Vaca Valley [Production 1.6] | 31 | A | Leon Mandel | Ed La Mantia | DNA |
| 5.7.1958 | Preliminary Vaca Valley [Alfa+MGA+356] | 31 | A | Ed La Mantia | Ed La Mantia | DNA |
| 5.7.1958 | Preliminary Vaca Valley [Alfa+MGA+356] | 32 | A | Bob Potter | Bob Potter | DNA |
| 5.7.1958 | Preliminary Vaca Valley [Alfa+MGA+356] | 40 | A | Jack Dalton | Jack Dalton | DNA |
| 5.7.1958 | Preliminary Vaca Valley [Alfa+MGA+356] | 45 | A | John Jordan | John Jordan | DNA |
| 5.7.1958 | LASC Green Acres [S+2.6] | 46 | A | Bill Blum | William Blum | DNA |
| 5.7.1958 | LASC Green Acres [MG] | 47 | A | Graham Hill | Scale's Garage Ltd. | 7th |
| 5.7.1958 | LASC Green Acres [MG] | 49 | A | John Francis | J. C. Francis | 12th |
| 5.7.1958 | Preliminary Vaca Valley [Alfa+MGA+356] | 52 | A | Fraser Sibbald | Frazer Sibbald | DNA |
| 5.7.1958 | Preliminary Vaca Valley [Alfa+MGA+356] | 61 | A | Mogens Skou | Charles Serlis | DNA |
| 5.7.1958 | Novice Vaca Valley [Production 1.6] | 61 | A | Charles H. Serlis | Charles H. Serlis | DNA |
| 5.7.1958 | Preliminary Vaca Valley [Alfa+MGA+356] | 66 | A Twin Cam | Jack Flaherty | Kjell Qvale | raced |
| 5.7.1958 | National Open Crystal Palace [GT] | 68 | A | D. J. Hayles | | DNA |
| 5.7.1958 | National Open Crystal Palace [GT] | 69 | A | David Dixon | | DNA |
| 5.7.1958 | National Open Crystal Palace [GT] | 70 | A | Ken MacKenzie | | 4th |
| 5.7.1958 | National Open Crystal Palace [GT] | 71 | A | Doug Wilcocks | | DNA |
| 5.7.1958 | LASC Green Acres [MG] | 73 | A | William Hopkins | Ecurie Grande | 10th |
| 5.7.1958 | Novice Vaca Valley [Modified] | 80 | Special | Steve Newland | Mace-Newland | DNA |
| 5.7.1958 | National Open Crystal Palace [GT] | 91 | A | J. A. P. Trafford | | DNA |
| 5.7.1958 | Preliminary Vaca Valley [Alfa+MGA+356] | 98 | A | Ed Leslie | Ed Leslie | DNA |
| 5.7.1958 | Novice Vaca Valley [Production 1.6] | 99 | TC | Odette Bigler | Odette Bigler | DNA |
| 5.7.1958 | LASC Green Acres [MG] | 100 | A | Jack Paveling | | 1st |
| 5.7.1958 | Novice Vaca Valley [Production 1.6] | 106 | A | Joyce Sweet | Joyce Sweet | DNA |
| 5.7.1958 | Preliminary Vaca Valley [Alfa+MGA+356] | 110 | A | Bob Winkelmann | Ed Crooks | DNA |
| 5.7.1958 | Preliminary Vaca Valley [Alfa+MGA+356] | 131 | A | Randall Cowherd | W. T. Ribbs | DNA |
| 5.7.1958 | Preliminary Vaca Valley [Alfa+MGA+356] | 134 | A | Rick Hilgers | Richard Hilgers | DNA |
| 5.7.1958 | Novice Vaca Valley [Production 1.6] | 134 | A | Rick Hilgers | Richard Hilgers | DNA |
| 5.7.1958 | Novice Vaca Valley [Production 1.6] | 135 | A | Gilbert Haley | Gilbert F. Haley | DNA |
| 5.7.1958 | Preliminary Vaca Valley [TR+Morgan+AH+Veloce+Super] | 143 | A Twin Cam | Jack Flaherty | Kjell Qvale | DNA |
| 5.7.1958 | Novice Vaca Valley [Modified] | 158 | A Special | Eugene Smith | Dennis Riley | DNA |
| 5.7.1958 | Novice Vaca Valley [Production 1.6] | 182 | A | Ray De Costa | Raymond De Costa | DNA |
| 5.7.1958 | LASC Green Acres [MG] | 333 | A | Gord Brown | Bruce McEachern Sports Cars | 2nd |
| 5.7.1958 | Novice Hammond [S1.6] | | A | Charles Guidroz | | 3rd |
| 5.7.1958 | Novice Hammond [S1.6] | | A | Bill Campbell | | 2nd |
| 5.7.1958 | Novice Hammond [S1.6] | | A | Roy Dees | | 4th |