Build your Speed. Build your Strength.
Athletic skill and mechanics are only half the battle. Do you want to enable your body to reach its maximum potential? Whether on or off the field, a healthy and conditioned body will allow you to complete those physical tasks required of you much more efficiently.
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Our programs offer strength, speed, and agility training to help you take your game to its peak performance. Created by John Bisignano, the Director and Lead Instructor of Grand Slam Strength, you won't find a better supplemental program, whether in quality or in price, to help you reach your physical goals.
Our Staff...
Connor Warrick - Director and Lead Instructor - Warrick Performance
Connor Warrick started at Grand Slam in 2025 as Director and Lead Instructor for Grand Slam Strength. Connor was previously at Drake University where he was the Assistant Director of Sports Performance working with a large range of sports. He was the sports performance coach for the Drake Football team that won back to back PFL championships in 2023 and 2024. He also was the sports performance coach for the Drake Men’s Basketball team that won both regular and conference championship honors with a first round victory in the NCAA tournament.
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He earned his Master’s degree in Applied Health and Sport Sciences from Northwest Missouri State in Maryville, MO while also working as a strength coach with baseball, throws, women’s golf, and football.
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Before his time at Northwest, Connor was a student athlete at Simpson College where he played football and competed in throws for the track team while earning his Bachelor’s in Exercise Science. He also has stops at Iowa State University, University of Iowa, and Urbandale High School.
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Connor holds a Certified Strength and Conditioning Specialist (CSCS) and Reflexive Performance Reset - Level 1 certifications.
Connor looks forward to helping all ages of athletes achieve their goals for their sports!
Parents check in! He also has a passion for helping adults in their fitness goals, as well.
Whatever the goals are Connor can help you achieve them!
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Brian Joseph - Instructor - Creed Athlete
Brian has been affiliated with Grand Slam USA in many capacities over the years including Camps, Clinics, and Lessons. Currently, Brian serves as a police officer. He is a lead instructor of police recruits, and he also serves as a SWAT operator. During his off-duty time, Brian also coaches youth softball and baseball. He is married and is a father of four.
Through those capacities, Brian makes the connection between lessons learned on the field, in professions, and in life. In addition to traditional Speed, Strength, and Agility training, this gave him the idea to start the Creed Program.
Through Creed Athlete, he strives to assist youth and young adults in establishing their own creeds, building mental fortitude, and growing into more confident and driven individuals. From faith, fitness, goal-setting, and to overall life-improvements, Brian seeks to assist all, athletes or not, in establishing and living out their creeds.
Curent Programs
*A Liability Release Waiver must be sign by all participants. Please fill out the form below and leave with a staff member at the facility.