Buuxi weedha soo socota: Bishii Febraayo 2015, Manor Marussia waxay ku dhawaaqday Stevens inuu yahay mid ka mid ah wadayaasheeda iyadoo maalgelin weyn u keentay kooxda, oo ay weheliyaan Roberto Merhi. Marussia ayaa ka qeyb gashay Grand Prix-ka Australia laakiin kuma tartamin arrimo farsamo awgood. Tartanka Malaysian Grand Prix, Stevens wuxuu markii ugu horeysay ku waday baabuurka Marussia ee tababarka 1. Si kastaba ha noqotee, kuma tartamin isreebreebka ama tartanka sababtoo ah dhibaato ku timid nidaamka shidaalka. Tartanka Grand Prix ee Shiinaha, Stevens wuxuu ku dhammeeyey tartankiisii ugu horreeyay ee Marussia isagoo kaalinta 15-aad ka sareeyay saaxiibkiis Merhi ka dib markii uu laba jeer ku guuleystay tartanka Lewis Hamilton. Stevens ayaa ka hormaray Merhi
Baxreyn iyo Isbaanishka. Waxa uu ka dambeeyay Merhi ee Monaco Grand Prix ee 16aad. Tartanka Grand Prix ee Kanada wuxuu u qalmay Merhi laakiin wuxuu u dhaqaaqay kaalinta 17aad sababo la xiriira ganaaxyada Jenson Button, Sebastian Vettel iyo Max Verstappen. Tartanka wareega 52aad, Romain Grosjean oo ka tirsan Lotus ayaa wareejinayay Stevens laakiin wuxuu gooyay taayirkiisa bidix ee gadaal isagoo sidaas sameynaya taas oo sababtay in labada darawalba ay sameeyaan istaag degdeg ah. Makiinadleyda Lotus iyo Marussia waxay haysteen waqti yar si ay uga falceliyaan wadayaashooda oo ka soo horjeeda sidaas darteed Grosjean iyo Stevens labaduba waxay qaateen joojin dheer. Stevens wuxuu raadiyaha uga cabanay kooxdiisa dhacdada. Grosjean wuxuu helay 5 ilbiriqsi oo ganaax ah isku dhaca laakiin Stevens wuxuu ka dhacay 4 ilbiriqsi oo ka dambeeya Merhi ilaa daqiiqad ka dambeysa isaga. Si kastaba ha noqotee, Merhi waxaa lagu qasbay inuu ka fariisto wareegga 56aad kadib markii uu soo wajahay dhibaato xagga mashiinka. Stevens ayaa ugu danbeyntii ku dhamaaday kaalinta 17-aad, 4 wareeg oo ka dambeysa guuleystaha tartanka Lewis Hamilton. Tartanka kadib, Grosjean wuxuu ka cudur daartay dhacdadii dhacday. Intii lagu guda jiray tartamada dambe ee xilli ciyaareedka, Merhi waxaa lagu beddelay Alexander Rossi oo ka sarreeyay Stevens 3 ka mid ah 4 tartan.