• 2004-07-15 Signed a one-year contract with New Jersey Devils - terms and conditions of the deal were not disclosed (reportedly worth $0.5 million).

• 2004-03-13 400th NHL game (Calgary vs. Nashville 4-4)
  

• 2003-07-30 Signed a one-year contract with Calgary Flames - terms and conditions of the deal were not disclosed (reportedly worth $0.5 million).

• 2003-07-01 Bought out from his contract (1 year left) by Boston Bruins and became unrestricted free agent.

• 2003-01-06 Traded to the Boston Bruins in exchange for a ninth round pick in the 2004 draft.
  

• 2002-12-06 Assigned to the Hartford Wolf Pack of the American Hockey League (AHL).
  

• 2002-07-17 Agreed to terms on a two-year contract with NY Rangers - terms and conditions of the deal were not disclosed (reportedly worth $1.75 million).

• 2002-06-23 Traded to the NY Rangers for the future considerations.
  

• 2002-04-13 300th NHL game (Pittsburgh vs. Boston 1-7)
  

• 2002-03-24 1000th PIM in NHL (Pittsburgh vs. Washington 6-2)
  

• 2001-01-14 Traded to the Pittsburgh Penguins for the third round pick in the 2001 draft.
  

• 2000-08-01 Agreed to terms on a two-year contract (worth $1.7 million) with Columbus Blue Jackets.
  

• 2000-06-12 Traded to the Columbus Blue Jackets for the third round draft pick 2001 and future considerations.
  

• 2000-06-10 Won the Stanley Cup !!! (the 1st Polish player to win the Stanley Cup)
  

• 2000-03-17 200th NHL game (New Jersey vs. Tampa Bay 1-3)
  

• 1999-03-27 500th PIM in NHL (New Jersey vs. Chicago 4-4)
  

• 1999-01-02 100th NHL game (New Jersey vs. Ottawa 0-6)
  

• Finished the 1997-98 season with 295 PIM - 3rd in the NHL !!! (carrer highest in NHL)
  

• 1998-04-22 First playoff penalty ; 2 min boarding.
  

• 1998-04-22 First playoff game (New Jersey vs. Ottawa 1-2 SD)
  

• 1998-03-07 First NHL goal (New Jersey vs. New York Rangers 6-3)
  

• 1997-10-29 First NHL point (New Jersey vs. Vancouver 8-1)
  

• 1997-03-09 First NHL penalty ; 5 min fighting major
  (Krzysztof fought Bob Boughner on his 1st shift in NHL !!!)

• 1997-03-09 First NHL game (New Jersey vs. Buffalo 4-1)
  

• 1993 Selected by the New Jersey Devils in the 3rd round (65th overall) in the 1993 NHL Entry Draft (4th Devils pick).