Pedzisa mutsara unotevera: Musi wa13 Gunyana 2018, Karlsson (pamwe naFrancis Perron) vakatengeswa kuSan Jose Sharks mukutsinhana naChris Tierney, Dylan DeMelo, Josh Norris, Rūdolfs Balcers, Sarudzo yekutanga yeSharks muna 2020, wechipiri-kutenderera mu
2019 uye sarudzo dzomutambo wechipiri muna 2021. Akarova chibodzwa chake chekutanga neSharks musi wa18 Mbudzi mukukunda 4-0 pamusoro peSt. Louis Blues. Mushure mekutanga kunonoka kwemwaka, Karlsson akazova mudziviriri wechishanu munhoroondo yeligi kuti ave neanobatsira mumwe mumitambo gumi nemana yakateedzana zvichitevera kukunda 7<unk>2 pamusoro peEdmonton Oilers musi wa 8 Ndira 2019. Musi wa 23 Zvita, Karlsson akamiswa kekutanga mubasa rake kwemitambo miviri yekutarisa zvisiri pamutemo kumusoro wemutambi weLos Angeles Kings Austin Wagner. Kukuvara kwegumbo kwakakonzera kuti Karlsson arasikirwe nemitambo yakawanda pedyo nekupera kwemwaka asati adzoka kumutambo wekupedzisira wemwaka uchipesana neColorado Avalanche. Akapedza mwaka aine mapoinzi makumi mana nemashanu mumitambo makumi mashanu nematatu, chikamu chake chakaderera kubva mwaka wa45-2012. Karlsson akabatsira San Jose kusvika kuWestern Conference Finals panguva ye2019 playoffs, kunyangwe akatambura kumwe kukuvara kwegumbo mumutambo wakanangana neSt. Louis Blues, zvichikonzera kuti arasikirwe nemutambo wekupedzisira weSan Jose weplayoffs apo timu yakarasikirwa 5<unk>1 muMutambo 6. Aizopedza playoffs aine 16 mapoinzi mumitambo 19. Musi waMay 31, akavhiyiwa muzongoza.