Head Coach:  Brian Marker

The Rudgear Rats are extremely excited to welcome Brian Marker back as Head Coach for the 2021 season. Brian’s experience, spirit and extreme enthusiasm for recreational swimming makes him an excellent fit for the Rats. Coach Brian has over ten years of swim coaching experience and tons of passion for the sport. He learned the fundamentals of stroke instruction while coaching at the Terrapins year round swim team in Concord. There he coached all age levels and won the designation of Pacific Swimming Zone 2 All Star Coach twice. 

Coach Brian’s true passion lies with coaching summer league programs. He has coached at Dewing Park, and most recently was Head Coach of Forrest Hills Swim Team for two years. Brian is a native of Walnut Creek, he swam for Dewing Park and is a graduate of Las Lomas High School. Coach Brian is excited to be back to his roots within the Walnut Creek Swim Conference where he aspires to make the Rats the destination for spirit, fun and tradition! Brian looks forward to team socials, dress-up days and creating a fun environment for all ages. He has innovative ideas and is a strong advocate for team traditions. Being a big Oakland A’s fan Coach Brian already has a closet full of green gear and is ready to hit the deck running! 


Assistant Head Coach: Briona Robinett

Hello everyone, I am so excited to be a part of the Rudgear Estates family for the 2021 season! A little bit about me: After being on a rec team for 12 years I know how impactful these summers can be for swimmers. Some of my favorite memories are of building friendships and learning how to work hard in order to reach my goals for swim team. My favorite strokes were butterfly and backstroke! This will be my 5th season coaching and my 4th year working with our amazing Head Coach Brian. I know the swim season isn’t completely back to normal yet, but I am still beyond excited to work hard and have some fun with everyone this year. See you on the pool deck!


Assistnat Coach: Cate Granskog

Hi everybody! My name is Cate. I just finished my sophomore year at the University of Portland where I am studying Secondary Education and English. I've been a coach for the Rats for seven years, and am so excited to return as an Assistant Coach this year. I started as a RAT when I was nine, and never left. I specialized in freestyle and breaststroke. I love the spirit and attitude of the team, and can't wait to work hard and play hard. Let's have a great season! GO RATS!!


Assistant Coach: Simone Ostler

Hey y’all! My name is Simone Ostler and I couldn’t be more excited to join the REST coaching staff. I just finished my sophomore year at Texas Christian University where I am an early childhood education major. I swam on RMST for six years and then swam year round for five years on Orinda Aquatics. I coached on RMST for five years and ran the learn to swim program my final year there, as well. My favorite stroke is butterfly and I love helping swimmers work on their technique. I am super excited to meet everyone, GO RATS!!


Junior Coach: Maddie Granskog

Hi everyone! My name is Maddie and I attend Las Lomas High School where I participate in many activites like leadership and cheerleading. This will be my eleventh season as a swimmer for the RATS and my first season as a junior coach! I have been part of our team's Rat Pck before and can't wait to start coaching! My favorite stroke is butterfly and some of my favorite parts of swim team are the memories we make over the summer and the accomplishments we achieve. I can't wait for the season to start and to have some fun!