| 22.3.1958 | 12 h Sebring | 7 | 300S | Duncan / Bonnier | A. V. Dayton | DNF |
| 22.3.1958 | 12 h Sebring | 32 | 200S I | Kimberly / Lovely | Jim Kimberly | DNF |
| 22.3.1958 | 12 h Sebring | | 300S | Rose / Ruby / Stonedale | Carroll Shelby | DNA |
| 23.3.1958 | SCCA Regional Stockton [S+1.5] | 18 | A6GCS | Chuck Tannlund | | 6th |
| 23.3.1958 | SCCA Regional Stockton [S1.5] | 117 | 150S | Chick Leson | | DNS |
| 23.3.1958 | SCCA Regional Stockton [S+1.5] | | 200S I | Chuck Howard | | DNA |
| 23.3.1958 | SCCA Regional Stockton [S+1.5] | | Zagato Coupe | John Fox | | DNA |
| 30.3.1958 | GP Pergusa | 8 | A6GCS/53 | "Wal Ever" | | 3rd |
| 30.3.1958 | GP Pergusa | | 200S | Giuseppe Allotta | | 8th |
| 30.3.1958 | GP Pergusa | | | Giorgio Scarlatti | | raced |
| 30.3.1958 | GP Pergusa | | 200S | Adolfo Tedeschi | | 1st |
| 30.3.1958 | GP Pergusa | | 200S | Bruno Ruffo | | 2nd |
| 30.3.1958 | GP Pergusa | | 200S | Franco Bordoni | | 5th |
| 30.3.1958 | GP Pergusa | | 200S | Odoardo Govoni | | 4th |
| 13.4.1958 | SCCA Regional Palm Springs [FM+GM+HM] | 53 | | Jack Brumby | Ray Martinez | DNS |
| 13.4.1958 | SCCA Regional Palm Springs [FM+GM+HM] | 87 | 150S | Bob Oker | Dusty Miller | DNS |
| 13.4.1958 | SCCA Regional Palm Springs [BM+CM+DM+EM] | 98 | 450S | Carroll Shelby | John Edgar | DNS |
| 13.4.1958 | SCCA Regional Palm Springs [BM+CM+DM+EM] | 111 | 200S I | Chuck Howard | | 8th |
| 13.4.1958 | Coppa Shell Monza | | | Franco Bordoni | | 2nd |
| 13.4.1958 | Coupes de Vitesse [S2.0] | | A6GCS | Edmond Laub | | 8th |
| 13.4.1958 | Coppa Shell Monza | | | Bruno Ruffo | | 3rd |
| 13.4.1958 | Coppa Shell Monza | | 200S | Govoni | | DNF |
| 13.4.1958 | Coppa Shell Monza | | A6GCS/53 | "Wal Ever" | | DNF |
| 13.4.1958 | Coppa Shell Monza | | | Cigarini | | DNF |
| 13.4.1958 | Coppa Shell Monza | | 200S I | Negri | | 7th |
| 13.4.1958 | Coppa Shell Monza | | | Tedeschi | | DNF |
| 20.4.1958 | SCCA Regional Galveston [Modified] | 1 | 200S I | Jack Hinkle | | 4th |
| 20.4.1958 | Preliminary Galveston [CM+DM+EM] | 1 | 200S I | Jack Hinkle | | 5th |
| 20.4.1958 | SCCA National Marlboro [BM+CM+DM+EM+FM] | 36 | 300S | Bark Henry | | DNF |
| 20.4.1958 | SCCA National Marlboro [BM+CM+DM+EM+FM] | 43 | A6GCS | Ben Diaz | | 13th |
| 20.4.1958 | Preliminary Galveston [FM+GM+HM] | 44? | 150S | Jim Hall | | raced |
| 20.4.1958 | SCCA Regional Galveston [Modified] | 45 | 450S | J. E. Rose | | 1st |
| 20.4.1958 | Preliminary Galveston [CM+DM+EM] | 45 | 450S | J. E. Rose | Carroll Shelby | 1st |
| 20.4.1958 | SCCA Regional Galveston [Modified] | 68 | 250S | Hall | Carroll Shelby Sportscar, Inc. | 6th |
| 20.4.1958 | SCCA Regional Galveston [Modified] | | 200S I | Norman Scott | | DNA |
| 27.4.1958 | SCCA Regional Lime Rock [CM+DM+EM+FM+GM] | 8 | 200S I | John Fitch | | 2nd |
| 27.4.1958 | SCCA Regional Lime Rock [CM+DM+EM+FM+GM] | 43 | 150S | E. F. Spicer | | DNA |
| 27.4.1958 | SCCA Regional Lime Rock [BM+BP+CP+UR+FIII] | 111 | 4CLT/48 | George Weaver | | DNA |
| 27.4.1958 | SCCA Regional Louisville [BM+CM+DM+EM+FM+GM] | 136 | 300S | Bark Henry | | raced |
| 27.4.1958 | Preliminary Louisville [BM+CM+DM+EM+FM+GM] | 136 | 300S | Bark Henry | | 1st |
| 27.4.1958 | GP Napoli | 142 | 200S | Jo Bonnier | | 1st |
| 27.4.1958 | GP Napoli | 150 | A6GCS/53 | "Wal Ever" | | DNF |
| 27.4.1958 | Preliminary Dunnellon [race 3] | | | George Koehne | | 2nd |
| 27.4.1958 | GP Napoli | | 200S | Antonio Negli | | 4th |
| 27.4.1958 | Dunnellon [Main] | | 200S I | George Koehne | | DNF |
| 27.4.1958 | GP Napoli | | 200S | Ulf Norinder | | ?th |
| 27.4.1958 | GP Napoli | | 200S | Guido Perrella | | 11th |
| 27.4.1958 | GP Napoli | | 200S | Mennato Boffa | | 2nd |
| 27.4.1958 | GP Napoli | | 200S | Franco Bordoni | | 7th |
| 27.4.1958 | GP Napoli | | 200S | Odoardo Govoni | | 5th |
| 27.4.1958 | GP Napoli | | A6GCS/53 | Enzo Lopez | | 8th |
| 4.5.1958 | SCCA National Virginia [BM+CM+DM+EM+FM+BP+CP] | 36 | 300S | Bark Henry | | DNA |
| 4.5.1958 | Preliminary Virginia [BP+CP+BM+CM+DM+EM+FM] | 36 | 300S | Bark Henry | | DNA |
| 11.5.1958 | Targa Florio | 82 | 200S I | Perrella / Giovanardi | | DNS |
| 11.5.1958 | Targa Florio | 84 | 200S I | Boffa / Govoni | Maserati | DNF |
| 11.5.1958 | Targa Florio | 92 | A6GCS/53 | Giuseppe Alotta | | DNS |
| 11.5.1958 | Targa Florio | 94 | 200S I | Lopez / Bornigia | | DNS |
| 11.5.1958 | SCCA Regional Tracy [CM+DM+EM] | 138 | 200S I | Chuck Howard | Charles S. Howard | 3rd |
| 11.5.1958 | SCCA Regional Tracy [CM+DM+EM] | 198 | 450S | Dan Gurney | John Edgar | DNF |
| 11.5.1958 | Targa Florio | | 200S I | Jo Bonnier | | DNA |
| 11.5.1958 | Targa Florio | | 200S I | Luigi Bellucci | | DNA |
| 11.5.1958 | Hawaii [S+1.6] | | | | Carroll Shelby | DNA |
| 15.5.1958 | Eläintarhanajo | 7 | 200S | Ulf Norinder | | 7th |
| 15.5.1958 | Aspern [S+1.5] | 7 | 200S I | Antonio Negri | Antonio Negri | raced |
| 15.5.1958 | Aspern [S+1.5] | 8 | 200S | Alberico Cacciari | Alberico Cacciari | raced |
| 15.5.1958 | Aspern [S+1.5] | 9 | A6GCS/53 | "Wal Ever" | "Wal-Ever" | raced |
| 15.5.1958 | Aspern [S+1.5] | 10 | 200S I | Odoardo Govoni | Odoardo Govoni | raced |
| 15.5.1958 | Aspern [S+1.5] | 14 | | | | raced |
| 17.5.1958 | Chester | 26 | 450S | Dan Clippenger | | 1st |
| 18.5.1958 | GP Spa | 3 | 200S | Franco Bordoni | | ?th |
| 18.5.1958 | GP Spa | 4 | 200S I | Antonio Negri | | ?th |
| 18.5.1958 | GP Spa | 5 | A6GCS/53 | "Wal Ever" | | 15th |
| 18.5.1958 | GP Spa | 6 | A6GCS | Laub | | ?th |
| 25.5.1958 | GP des Frontières | 2 | 200S | Ulf Norinder | | DNF |
| 25.5.1958 | GP des Frontières | 4 | 200S I | Antonio Negri | | 4th |
| 25.5.1958 | GP des Frontières | 10 | A6GCS | Edmond Laub | | 11th |
| 25.5.1958 | GP des Frontières | 32 | A6GCS | De Thorey | | 9th |
| 25.5.1958 | GP des Frontières | 40 | A6GCS/53 | "Wal Ever" | | DNF |
| 31.5.1958 | Preliminary Santa Barbara [Modified 1.5] | 8 | 150S | Miller / Oker | Dusty Miller | DNA |
| 31.5.1958 | Preliminary La Junta [BM+CM+DM+EM+FM+GM] | 8 | 200S I | Jack Hinkle | | 2nd |
| 31.5.1958 | Preliminary La Junta [BM+CM+DM+EM+FM+GM] | 24 | 450S | Dabney Collins | | DNF |
| 31.5.1958 | Preliminary Santa Barbara [Modified +1.5] | 53 | | Chuck Kessinger | Jack Brumby | DNA |
| 1.6.1958 | Santa Barbara [FM+GM+HM] | 8 | 150S | Dusty Miller | Dusty Miller | 8th |
| 1.6.1958 | SCCA Regional La Junta [BM+CM+DM+EM+BP+CP+DP] | 8 | 200S I | Jack Hinkle | | 2nd |
| 1.6.1958 | 1000 km Nürburgring | 16 | 300S | Godia-Sales / Bonnier | Francisco Godia | DNS |
| 1.6.1958 | 1000 km Nürburgring | 18 | 200S I | Ulf Norinder | Norinder | DNS |
| 1.6.1958 | SCCA Regional La Junta [BM+CM+DM+EM+BP+CP+DP] | 24 | 450S | Dabney Collins | | DNS |
| 1.6.1958 | Santa Barbara [BM+CM+DM+EM] | 53 | | Chuck Kessinger | Jack Brumby | DNF |
| 1.6.1958 | SCCA Regional La Junta [BM+CM+DM+EM+BP+CP+DP] | 183 | | Bob Claypool | | 4th |
| 7.6.1958 | Preliminary Eagle Mountain [race 3] | 45 | 450S | J. E. Rose | | DNS |
| 7.6.1958 | Preliminary Eagle Mountain [race 3] | | 300S | J. E. Rose | | 3rd |
| 8.6.1958 | SCCA Regional Thompson [UR+FIII] | 11 | 4CLT/48 | George Weaver | | DNF |
| 8.6.1958 | SCCA Regional Eagle Mountain [race 10] | 45 | 450S | J. E. Rose | | DNS |
| 8.6.1958 | SCCA Regional Eagle Mountain [race 10] | 67 | 250S | Jim Hall | Carroll Shelby Sportscar, Inc. | 3rd |
| 8.6.1958 | SCCA Regional Eagle Mountain [race 10] | | 300S | J. E. Rose | | 4th |
| 15.6.1958 | SCCA Regional Laguna Seca [CM+DM+EM] | 1 | 200S | Lance Reventlow | | 3rd |
| 15.6.1958 | SCCA National Lime Rock [BM+CM+DM+EM+FM] | 8 | 200S I | John Fitch | | 4th |
| 15.6.1958 | Prix de Paris [S2.0] | 84 | A6GCS/53 | Maurice Caillet | | 4th |
| 15.6.1958 | Opatija [S2.0] | | A6GCS/53 | "Wal Ever" | | 3rd |
| 15.6.1958 | Opatija [S2.0] | | 200S I | Odoardo Govoni | | 2nd |