Casey Lawrence, who made six starts for the major league team last season, has a 5.81 ERA in 12 starts with the Bisons this year. The top pick would be third-place finisher Yosver Zulueta, but he’s yet to completely outrun Buffalo, posting a 4.91 ERA in 17 appearances and seven starts. Meanwhile, big prospect Ricky Tiedemann since May 4 hasn’t had a problem with his left bicep, and even if he’s healthy, the club isn’t likely to rush into developing the southpaw.