Kowalewski made his top-flight debut with Wigry Suwałki during the 1996–97 season, but it was not until 2001–02, after a loan spell with second division side Dyskobolia Grodzisk, that he finally established himself with Legia.
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Kowalewski has a reputation of being an excellent penalty-saver, once breaking FC Torpedo Moskva's Vladimir Leonchenko's streak of 13 successful spot-kicks.
Wojciech Jaruzelski | Wojciech Kilar | Wojciech Orliński | Wojciech Giertych | Wojciech Żukowski | Wojciech Stępień | Wojciech Stattler | Wojciech Sekuła | Wojciech Młynarski | Wojciech Marczewski | Wojciech Łobodziński | Wojciech Kurtyka | Wojciech Korfanty | Wojciech Jastrzębiec | Wojciech Gerson | Wojciech Fibak | Wojciech | Alfred Wojciech Potocki |