Debutant medium-pacer Vijaykumar Vyshak took 3-20 to help Royal Challengers Bangalore beat last-place Delhi Capitals by 23 runs in the Indian Premier League on Saturday. Vyshak shared five wickets with Mohammed Siraj, who took 2-23 in his four overs, as Delhi was restricted to 151-9 in response to Bangalore’s 174-6. Bangalore’s Virat Kohli scored his…