1. Is there a difference with the exit
velocity of a baseball coming off of a
BBCOR or BESR certified aluminum
2. In 2011, the NCAA approved and implemented the use
of BBCOR baseball bats
In 2010, the NCAA was under BESR baseball bats
Why is it important and why the changes?
Reduce the exit speed of the baseball.
BBCOR bats perform more like a wood bat
Speed up the game
Prepare athletes better for the pros
It has arguably changed the scope of baseball and how
the game is played. Teams are now having to rely on
bunting more to score runs, rather than relying on
It changes the way coaches coach and players react!
3. Velocity: The rate of speed calculated in Miles Per
Coefficient of Restitution/Trampoline Effect: The
coefficient of restitution is a measure of the elasticity
of the collision between ball and bat. Elasticity is a
measure of how much bounce there is, or in other
words, how much of the kinetic energy of the
colliding objects before the collision remains as
kinetic energy of the objects after the collision.
Ball Exit Speed Velocity- Maximum exit velocity of
a ball coming off of a bat after the point of contact. A
brand new bat must not exceed an exit speed of 97
miles per hour.
4. Ha: The exit velocity of a baseball coming off of a
BESR certified bat will be higher than a ball exiting a
BBCOR certified bat!
Ho: There will be no significant difference in the exit
velocity off of a BESR or BBCOR certified bat!
Exit velocity of a baseball coming off a BESR or
BBCOR certified bat using a standard stationary
8 MSU-Billings University Baseball Players
College aged Freshman-Seniors
18-24 year old males
Trained Collegiate Baseball Athletes
7. Stalker Radar Gun- Used to see velocity/speed of the
5 Wilson A1001-Red Cushioned Cork Center:
Premium Leather (Brand New Pearls)
ATEC Tee- Standardized and Stationary
Batting Cage/Net- Located in Lower Gym: MSU-
9. Participant- Parallel to the tee and perpendicular to the
11. Participants randomly selected. 8 total participants
Tee placed in front of net
Each participant hit 5 Pearls with each bat
KEY/Instruction: Hit the ball as hard as possible
directly into the net and directly at the radar gun
The exit velocity of the baseball was recorded after
each swing in miles per hour.
12. True Experimental Design-Groups were randomly
formed, and all subjects were equivalent at the
beginning of the research.
R T O
T-Test for Correlated Samples- Vassar Stats
13. F Value= 2.15
DF (Degree of Freedom) between groups=7
DF 7 at the .05 level is=.6664
MUST REJECT NULL HYPOTHESIS
14. History-Fatigue of Participants
Health of each bat- Dents and overuse
Health of Athletes- Rehab?
Expectations of Athlete/Researcher