New Delhi, May 8 -- Former England ball-tweaker Graeme Swann decoded the reason behind off-spinners' ineffectiveness in the 18th edition of the Indian Premier League (IPL) as the tournament heads towards its business end.

Off-spinners have struggled to impress in the current season, and wrist spin dependency has increased heavily. Ravichandran Ashwin, a magician in the craft of off-spin, was dropped by the eliminated Chennai Super Kings in the middle of the season.

While Kolkata Knight Riders' premier spinner Sunil Narine and Rajasthan's Maheesh Theekshana rely on their mystery spin. On the other hand, all-rounders Will Jacks and Aiden Markram have been used as match-up options against the left-handed batters.

"The reason there's not t...