Did you know Ryan Sipes announced his retirement this week? Or that Australia has a rippin' Supercross of their own and American Josh Hill scroed his first podium of the season? Don't worry - the MotoSport Friday 5 grabs the week's headlines and other cool tidbits you should know and compiles them right here.

Ryan Sipes Announces Retirement

In an open letter sent to many Motocross news outlets, Ryan Sipes indicated his his decision to leave professional supercross and motocross after 10 years. IN the letter he said a full-time race schedule wasn't "in the cards for me anymore" as his priorities are now focused on home. But, he did leave open the possibility of doing some racing, so we'll see if we see Sipes enter some events next year.

Hill Snatches Win in Australia

American rider Josh Hill won the Pro Open final grabbing his first podium of the terex Australian Supercross Championship season. Weston Peick, also from the United States took second.

John Dowd- Twinshock Hero

Exclusive footage of John Dowd ripping the old Honda Twinshock at this years Vets MXdN. A fouled plug took him out of competing but after a quick spark plug switch he was back on the track.

Mullins Tightens XC1 Points Gap

At the 12th running of the ITP Powerline Park GNCC, Charlie Mullins captured a big overall win to put an end to MotoSport-sponsored rider Kailub Russell's previous five-race winning streak and tighten up the championship spread to just two points with one round to go.

3rd Annual Monster Energy Cup on Saturday

Las Vegas hosts the 3rd annual Monster Energy Cup this weekend where $1 million is on the line for the best in Motocross.