COLUMBUS — Another member of the Ohio State secondary is beginning to flash: freshman safety Leroy Roker has lost his black stripe at the end of Buckeyes training camp. The 6-foot-1, 170-pound safety only had three Power 4 offers coming out of Fort Myers (Fla.) Verot Beach high school — Ohio State, Iowa and Miami — and it only took the Buckeyes one weekend to win his pledge. Now he’s beginning to show why the Buckeyes wanted him so badly as part of their top-five class in 2024. Roker is the second Buckeyes safety to lose a black stripe this training camp, joining fellow first-year safety Jayle…