It happened about 8 o'clock at Post Oak Road and Clover Lane when the man lost control of his motorcycle as he tried to avoid a car that had driven out into his path.
Police say the driver's vision may have been obscured by the glare of the morning sun and therefore preventing him from seeing the yield sign.
The motorcycle rider slid under the vehicle as it crossed his path.
Police say it looks like the rider may have broken both legs.
Police say drivers should be extra cautious at dusk and dawn every day as the bright sun makes it difficult to see traffic.