Episode 539 -- Ken Waldichuk was one of the presumed favorites to land a role in the starting rotation come Opening Day, but he appears to have left the door open for a number of other guys in camp. Who are the dark horse candidates that could join the A's rotation with a solid spring? Who is the frontrunner now? Subscribe to our YouTube channel! Get social with us: @ByJasonB + @LockedonAs + @InsideTheAs A's Top 30 Prospects: Who Rose, Who Fell? Support Us By Supporting Our Sponsors! Built Bar Built Bar is a protein bar that tastes like a candy bar. Go to builtbar.com and use promo code “LOCKEDON15,” and you’ll get 15% off your next order. FanDuel Make Every Moment More. Don’t miss the chance to get your No Sweat First Bet up to ONE THOUSAND DOLLARS in Bonus Bets when you go FanDuel.com/LOCKEDON. LinkedIn LinkedIn Jobs helps you find the qualified candidates you want to talk to, faster. Post your job for free at LinkedIn.com/LOCKEDONMLB.  FANDUEL DISCLAIMER: 21+ in select states. First online real money wager only. Bonus issued as nonwithdrawable free bets that expires in 14 days. Restrictions apply. See terms at sportsbook.fanduel.com. Gambling Problem? Call 1-800-GAMBLER or visit FanDuel.com/RG (CO, IA, MD, MI, NJ, PA, IL, VA, WV), 1-800-NEXT-STEP or text NEXTSTEP to 53342 (AZ), 1-888-789-7777 or visit ccpg.org/chat (CT), 1-800-9-WITH-IT (IN), 1-800-522-4700 (WY, KS) or visit ksgamblinghelp.com(KS), 1-877-770-STOP (LA), 1-877-8-HOPENY or text HOPENY (467369) (NY), TN REDLINE 1-800-889-9789 (TN) Learn more about your ad choices. Visit podcastchoices.com/adchoices