Grist’s MRTI career totals: Races: 44 Wins: 6 Podiums: 10 Top 5’s: 18 Poles: 6 Fastest Laps: 7 PALMETTO, Fla. – Garett Grist decided five years ago to graduate from the karting ranks and pursue a formula car career. Now, three years into his tenure on the Mazda Road to Indy, Grist, who counts fellow…