Mild traumatic brain injuries have serious immediate and long-term effects on sports players. The purpose of this study is to measure the accelerations of the head during football impacts in order to reduce the risks of brain injuries in the future. Football was chosen because it is a head impact rich environment. A newly developed in-helmet six accelerometer system that transmits data via radio frequency to a receiver with a laptop unit on the sideline was implemented. The system can instantaneously provide the researcher with a visual representation of the immediate and cumulative game’s impacts of up to 64 players. From the data transfer of these accelerometer traces, the sideline staff has the head acceleration resultant, the head injury criteria value, the severity index value, and the direction and magnitude vector of the impact location. One game’s results are described in this paper to show a sample of the information being collected in this study. For eight players there were 347 total impacts with an average of 21.5 ± 19.7 g, 11.5 ± 33.4 HIC, 16.7 ± 51.2 GSI, 769.9 ± 1082.7 rad/s² rotation about the x-axis and 1382.8 ± 1547.3 rad/s² rotation about the y-axis. This in-helmet accelerometer system proves to be very useful in collecting accurate data that quantifies head accelerations for injured and non- injured players.