| 20.4.1958 | Marlboro [Handicap 2nd Heat] | 9 | Alfa Romeo Giulietta Spider Veloce | Bob Grossman | | 4th |
| 20.4.1958 | SCCA National Marlboro [FP+GP+HM] | 9 | Alfa Romeo Giulietta Spider Veloce | Bob Grossman | | 5th |
| 27.4.1958 | SCCA Regional Lime Rock [GP+HM+Sedan] | 152 | Alfa Romeo Giulietta Veloce | Bob Grossman | | 2nd |
| 4.5.1958 | Preliminary Virginia [FP+GP+HP+KP+HM] | | Alfa Romeo Giulietta Veloce | Bob Grossman | | ?th |
| 4.5.1958 | SCCA National Virginia [DP+EP+FP+GP+HP+KP+GM+HM] | | Alfa Romeo Giulietta Veloce | Bob Grossman | | ?th |
| 18.5.1958 | SCCA National Cumberland [GP+HP] | 9 | Alfa Romeo Giulietta Veloce | Bob Grossman | Robert H. Grossman | 4th |
| 31.5.1958 | SCCA National Bridgehampton [BP+CP+UR+FIII] | 91 | Jaguar XK120 | Bob Grossman | | DNF |
| 1.6.1958 | SCCA National Bridgehampton [GP+HP+HM] | 9 | Alfa Romeo Giulietta Veloce | Bob Grossman | | 1st |
| 8.6.1958 | SCCA Regional Thompson [FP+GP+HM+Sedan] | 4 | Alfa Romeo Giulietta Veloce | Bob Grossman | | DNA |
| 14.6.1958 | SCCA National Lime Rock [GP+HP+HM] | 9 | Alfa Romeo Giulietta Veloce | Bob Grossman | | DNF |
| 5.7.1958 | SCCA National Lime Rock [GP+HP+HM] | 9 | Alfa Romeo Giulietta Veloce | Bob Grossman | | 4th |
| 5.7.1958 | SCCA National Lime Rock [BP+CP] | 91 | Jaguar XK150 | Bob Grossman | | 6th |
| 13.7.1958 | LISCA Lime Rock [BP+CP] | 97 | Jaguar XK150 | Bob Grossman | | raced |
| 20.7.1958 | SCCA Regional Thompson [Production] | 19 | Jaguar XK150 | Bob Grossman | | raced |
| 20.7.1958 | SCCA Regional Thompson [BP+CP] | 19 | Jaguar XK150 | Bob Grossman | | raced |
| 17.8.1958 | SCCA National Montgomery [GP+HP+HM] | 9 | Alfa Romeo Giulietta Spider Veloce | Bob Grossman | | 2nd |
| 17.8.1958 | SCCA National Montgomery [BP+CP] | 19 | Jaguar XK150 | Bob Grossman | | 4th |
| 31.8.1958 | Preliminary Thompson [GP+HP+HM] | 90 | Alfa Romeo Giulietta Veloce | Bob Grossman | | 4th |
| 31.8.1958 | Preliminary Thompson [BP+CP] | 99 | Jaguar XK150 | Bob Grossman | | 6th |
| 1.9.1958 | SCCA National Thompson [GM+HM+GP+HP] | 90 | Alfa Romeo Giulietta Veloce | Bob Grossman | | DNF |
| 1.9.1958 | SCCA National Thompson [BP+CP+DP] | 99 | Jaguar XK150 | Bob Grossman | | 4th |
| 14.9.1958 | SCCA Regional Bridgehampton [BP+CP+DP+EP+FP+GP] | 9 | Jaguar XK150 | Bob Grossman | | 2nd |
| 14.9.1958 | Preliminary Bridgehampton [BP+CP+DP+EP+FP+HP] | 9 | Jaguar XK150 | Bob Grossman | | 2nd |
| 14.9.1958 | Preliminary Bridgehampton [Handicap] | 99 | Ferrari 860 Monza | Bob Grossman | | 2nd |
| 14.9.1958 | Preliminary Bridgehampton [Modified] | 99 | Ferrari 860 Monza | Bob Grossman | | DNF |
| 14.9.1958 | SCCA Regional Bridgehampton [Modified] | 99 | Ferrari 860 Monza | Bob Grossman | | 3rd |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 190 | Alfa Romeo Giulietta Veloce | Bob Grossman | Robert M. Grossman | 23rd |
| 20.9.1958 | SCCA National Watkins Glen [BP+CP] | 199 | Jaguar XK150 | Bob Grossman | Robert M. Grossman | 12th |
| 5.10.1958 | SCCA National Virginia [FP+GP+HM] | 90 | Alfa Romeo Giulietta Spider Veloce | Bob Grossman | | 2nd |
| 5.10.1958 | SCCA National Virginia [BP+CP+DP+EP] | 190 | Jaguar XK150 | Bob Grossman | | 5th |
| 18.10.1958 | Preliminary Lime Rock [GT] | 128 | Ferrari 250 GT | Bob Grossman | | 1st |
| 19.10.1958 | SCCA Regional Lime Rock [BP+CP+DP] | 9 | Jaguar XK150 | Bob Grossman | | 3rd |
| 4.12.1958 | Preliminary Nassau TT [GT+2.0] | 18 | Ferrari 250 GT | Potter / Grossman | Leonard Potter | 5th |
| 4.12.1958 | Nassau TT | 18 | Ferrari 250 GT | Grossman / Potter | Leonard Potter | 7th |
| 6.12.1958 | Nassau [Ferrari] | 18 | Ferrari 250 GT | Bob Grossman | Leonard Potter | 6th |
| 7.12.1958 | Nassau Memorial Trophy | 18 | Ferrari 250 GT | Bob Grossman | Leonard Potter | raced |