 Nyora kupfuurira kweiyi ndima - OSullivan akabata mamwe mazita maviri ekuronga mumwaka wa1997-98. Nokukunda mukwikwidzi wenguva nhatu Stephen Hendry 106 mumutambo wokupedzisira, OSullivan akakunda zita rake rechipiri reUK Championship. OSullivan akakundawo kuScottish Open nekukunda John Higgins 95 mufainari. Kwegore rechitatu rakatevedzana, OSullivan akapinda mumakwikwi ekupedzisira eCharity Challenge. Akakundwa, segore rakapfuura, mumutambo wokupedzisira wokugumisa, 89 kuna John Higgins. Kwenguva yokutanga mumakore matatu OSullivan haana kusvika kumagumo paMasters, achirasikirwa naSteve Davis. Mushure mokukunda Ken Doherty 93 mumutambo wokupedzisira weIrish Masters, kuongororwa kwemishonga kwakatevera mutambo kwakawana zvisaririra zvecannabis mumuviri wake. OSullivan akabviswa zita, akarasikirwa nemari yemubayiro uye zita rakapihwa Doherty neWPBSA. OSullivan akasvika paWorld Championshipsemi-finals kechipiri mubasa rake, asi akarasikirwa 917 kuna John Higgins aizova shasha. 