| 8.6.1958 | SCCA Regional Eagle Mountain [race 10] | | TC | Herb Rodier | | ?th |
| 14.6.1958 | SCCA National Lime Rock [GP+HP+HM] | 56 | TC | Arch McNeill | | DNF |
| 14.6.1958 | Preliminary Lime Rock [GT] | 90 | A | Alan Dillenberg | | 14th |
| 15.6.1958 | SCCA National Lime Rock [FP] | 6 | A | Sherman Decker | | 3rd |
| 15.6.1958 | SCCA National Lime Rock [FP] | 18 | A | Dan Donoghue | | 8th |
| 15.6.1958 | SCCA National Lime Rock [FP] | 27 | A | Don Miller | | 7th |
| 15.6.1958 | SCCA National Lime Rock [FP] | 51 | A | James Stevens | | 9th |
| 15.6.1958 | SCCA Regional Laguna Seca [FP+GP] | 74 | TD | Fred Biven | | 26th |
| 15.6.1958 | SCCA National Lime Rock [FP] | 78 | A | George Schaab | | 10th |
| 15.6.1958 | SCCA Regional Laguna Seca [FP+GP] | 81 | A | John Jordan | | 25th |
| 15.6.1958 | SCCA National Lime Rock [FP] | 90 | A | Alan Dillenberg | | 11th |
| 15.6.1958 | SCCA National Lime Rock [FP] | 114 | A | Huntley Perry | | 13th |
| 15.6.1958 | SCCA Regional Laguna Seca [FM+GM+FIII] | 149 | Special | Jerry Lewis | | 7th |
| 15.6.1958 | SCCA Regional Laguna Seca [FP+GP] | 157 | A | George Schillreff | | 19th |
| 15.6.1958 | Preliminary Laguna Seca [HM+Production I] | 157 | A | George Schillreff | | 3rd |
| 15.6.1958 | SCCA Regional Laguna Seca [FM+GM+FIII] | 158 | A | Dennis Riley | | 10th |
| 15.6.1958 | SCCA Regional Laguna Seca [CM+DM+EM] | 178 | Special | Wallace Thomas | | DNF |
| 15.6.1958 | SCCA National Lime Rock [FP] | 180 | A | Don Urian | | 6th |
| 15.6.1958 | SCCA Regional Laguna Seca [MG+HM] | | TF | John Miller | | 2nd |
| 15.6.1958 | SCCA Regional Laguna Seca [MG+HM] | | TD | Marshall Swope | | 3rd |
| 15.6.1958 | Preliminary Laguna Seca [HM+Production I] | | A | Ed Leslie | | 2nd |
| 15.6.1958 | SCCA Regional Laguna Seca [MG+HM] | | TC | Lendal Gray | | 1st |
| 22.6.1958 | SCCA National Road America [FP+GP+HP+HM] | 5 | A | Grant Crenshaw | Grant Crenshaw | 19th |
| 22.6.1958 | SCCA National Road America [FP+GP+HP+HM] | 17 | TD | Pat Robertson | Pat Robertson | DNF |
| 22.6.1958 | SCCA National Road America [FP+GP+HP+HM] | 21 | TF | Frank White, Jr. | Frank White, Jr. | 30th |
| 22.6.1958 | SCCA National Road America [FP+GP+HP+HM] | 24 | TF | Joe Mayer | Joseph R. Mayer | 24th |
| 22.6.1958 | SCCA National Road America [FP+GP+HP+HM] | 27 | A | Peter Hall | Peter Hall | DNA |
| 22.6.1958 | SCCA National Road America [FP+GP+HP+HM] | 39 | TF | Everett Pritchard | Everett Pritchard | DNA |
| 22.6.1958 | SCCA National Road America [FP+GP+HP+HM] | 44 | TF | Darrel Mahnke | Darrel Mahnke | 33rd |
| 22.6.1958 | SCCA National Road America [FP+GP+HP+HM] | 49 | TD | Dick Crombie | Dick Crombie | DNA |
| 22.6.1958 | SCCA National Road America [FP+GP+HP+HM] | 55 | A | Roger Simonetti | Roger Simonetti | 14th |
| 22.6.1958 | SCCA National Road America [FP+GP+HP+HM] | 73 | A | Ron Letellier | | 11th |
| 26.6.1958 | Preliminary Watkins Glen [Ladies] | 20 | A | Joyce Botkin | Robert F. Botkin | 8th |
| 26.6.1958 | Preliminary Watkins Glen [Ladies] | 212 | A | Laura Dasey | Homer Daisey | 7th |
| 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] | 5 | A | Henry Van Deusen | Henry Van Deusen | DNA |
| 27.6.1958 | Preliminary Watkins Glen [MG] | 12 | A | John Hunter | John Hunter, Jr. | 6th |
| 27.6.1958 | SCCA Regional Watkins Glen [FP+GP+Sedan] | 20 | A | Robert Botkin | Robert F. Botkin | DNA |
| 27.6.1958 | Preliminary Watkins Glen [MG] | 20 | A | Robert Botkin | Robert Botkin | DNF |
| 27.6.1958 | SCCA Regional Watkins Glen [FP+GP+Sedan] | 21 | TD | Van Conway | Van Conway | DNA |
| 27.6.1958 | Preliminary Watkins Glen [MG] | 21 | TD | Van Conway | Van Conway | 14th |
| 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] | 31 | A | Richard Soulsby | Dick Soulsby | 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] | 42 | A | Monty Allen | Monty Allen | DNF |
| 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 | Preliminary Watkins Glen [MG] | 56 | A | Jack Paveling | Jack Paveling | 4th |
| 27.6.1958 | SCCA Regional Watkins Glen [FP+GP+Sedan] | 56 | A | Jack Paveling | Jack Paveling | 14th |
| 27.6.1958 | SCCA Regional Watkins Glen [FP+GP+Sedan] | 59 | A | Johnny Boyd | Johnny Boyd | DNA |
| 27.6.1958 | Preliminary Watkins Glen [MG] | 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 | SCCA Regional Watkins Glen [FP+GP+Sedan] | 80 | A | Dennis Miller | | 16th |
| 27.6.1958 | Preliminary Watkins Glen [MG] | 80 | A | Dennis Miller | | 7th |
| 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] | 89 | A | Richard Kinsey | Richard Kinsey | 10th |
| 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 | Preliminary Watkins Glen [MG] | 114 | A | George Valentine | Ecurio-Gonzales | 2nd |
| 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 [S+2.6] | 46 | A | Bill Blum | William Blum | DNA |