ESPN: The Jayski Podcast

Mark Garrow has driver Trevor Bayne, who announced he has been diagnosed with multiple sclerosis.

Mark Garrow wraps up from Phoenix, where Kevin Harvick wins and Jimmie Johnson has a commanding points lead headed into Homestead. Mark Martin decides to hang up his helmet.

Mark Garrow has a Phoenix preview with Jimmie Johnson and Matt Kenseth, who are battling for the championship.

Mark Garrow has Jeff Gordon, who says Jimmie Johnson and Matt Kenseth may not look like rivals but looks can be deceiving. Johnson talks about his race prep for Phoenix.

Mark Garrow reports Juan Pablo Montoya is in trouble with the IRS. Dale Earnhardt Jr. is excited about his team's performance.

Mark Garrow has the story from Texas, where Jimmie Johnson dominated to win and now leads Matt Kenseth by seven points. Jeff Gordon crashed to end his title hopes.

Mark Garrow has a Chase preview from Texas Motor Speedway with contenders Matt Kenseth, Jimmie Johnson and Jeff Gordon. Martin Truex Jr. signs with the 78 team.

Mark Garrow chats with Jeff Gordon who is battling to catch Johnson and Kenseth in the Chase standings. Carl Edwards on how he deals post-race with a driver he's angry with.

Mark Garrow reports Dale Earnhardt Jr. and Brad Keselowski have very different views on a new mandatory baseline concussion testing rule.

Mark Garrow has Matt Kenseth, Jimmie Johnson and Jeff Gordon on points. Dale Earnhardt Jr. talks about 2014 mandatory baseline concussion testing.

Mark Garrow has a wrap-up from Martinsville, where Jeff Gordon drove into Victory Lane and Greg Biffle was cursing at Jimmie Johnson.

Mark Garrow has a Martinsville preview with Jimmie Johnson. NASCAR mandates baseline concussion testing, and Dale Earnhardt Jr. explains why it's a good idea.

Mark Garrow asked Dale Earnhardt Jr. after Talladega why he now has a career-high 22 runner-up finishes. Richard Petty explains releasing veteran crew chief Todd Parrott.

Mark Garrow takes a look at today's Texas test with Jimmie Johnson, Jeff Gordon and Kevin Harvick.

Mark Garrow examines the surprising late-race single-file racing at Talladega with Matt Kenseth, Jimmie Johnson and Kyle Busch. Plus, Dale Earnhardt Jr. on his final-lap strategy.