Mo is the all-time leader in World Series saves with 11 and postseason saves with 42. The next closest players have 6 and 18, respectively. He is 1st all-time in postseason ERA (despite pitching far more innings than anyone in the top 10), 8th in World Series ERA and 1st in both postseason and World Series appearances, among other things.

Postseason Pitching
Glossary
Year Round Opp    W/L  G GS  ERA W-L SV    IP  H ER BB  SO
---------------------+--+--+----+---+--+-----+--+--+--+---
1995 ALDS SEA L 3 0 0.00 1-0 0 5.3 3 0 1 8
1996 ALDS TEX W 2 0 0.00 0-0 0 4.7 0 0 1 1
ALCS BAL W 2 0 0.00 1-0 0 4.0 6 0 1 5
WS ATL W 4 0 1.59 0-0 0 5.7 4 1 3 4
1997 ALDS CLE L 2 0 4.50 0-0 1 2.0 2 1 0 1
1998 ALDS TEX W 3 0 0.00 0-0 2 3.3 1 0 1 2
ALCS CLE W 4 0 0.00 0-0 1 5.7 0 0 1 5
WS SDP W 3 0 0.00 0-0 3 4.3 5 0 0 4
1999 ALDS TEX W 2 0 0.00 0-0 2 3.0 1 0 0 3
ALCS BOS W 3 0 0.00 1-0 2 4.7 5 0 0 3
WS ATL W 3 0 0.00 1-0 2 4.7 3 0 1 3
2000 ALDS OAK W 3 0 0.00 0-0 3 5.0 2 0 0 2
ALCS SEA W 3 0 1.93 0-0 1 4.7 4 1 0 1
WS NYM W 4 0 3.00 0-0 2 6.0 4 2 1 7
2001 ALDS OAK W 3 0 0.00 0-0 2 5.0 4 0 0 4
ALCS SEA W 4 0 1.93 1-0 2 4.7 2 1 1 3
WS ARI L 4 0 1.42 1-1 1 6.3 6 1 1 7
2002 ALDS ANA L 1 0 0.00 0-0 1 1.0 1 0 0 0
2003 ALDS MIN W 2 0 0.00 0-0 2 4.0 0 0 0 4
ALCS BOS W 4 0 1.12 1-0 2 8.0 5 1 0 6
WS FLA L 2 0 0.00 0-0 1 4.0 2 0 0 4
2004 ALDS MIN W 4 0 0.00 1-0 0 5.7 2 0 0 2
ALCS BOS L 5 0 1.29 0-0 2 7.0 6 1 2 6
2005 ALDS LAA L 2 0 3.00 0-0 2 3.0 1 1 1 2
2006 ALDS DET L 1 0 0.00 0-0 0 1.0 1 0 0 0
2007 ALDS CLE L 3 0 0.00 0-0 0 4.7 2 0 1 6
2009 ALDS MIN W 3 0 0.00 0-0 1 3.7 4 0 1 7
ALCS LAA W 5 0 1.29 0-0 2 7.0 3 1 2 4
WS PHI W 4 0 0.00 0-0 2 5.3 3 0 2 3
2010 ALDS MIN W 3 0 0.00 0-0 2 3.3 2 0 0 1
ALCS TEX L 3 0 0.00 0-0 1 3.0 2 0 0 1
2011 ALDS DET L 2 0 0.00 0-0 0 1.3 0 0 0 1
---------------------+--+--+----+---+--+-----+--+--+--+---
16 Lg Div Ser 9-7 39 0 0.32 2-0 18 56.0 26 2 6 44
9 Lg Champ Ser 7-2 33 0 0.92 4-0 13 48.7 33 5 7 34
7 World Ser 5-2 24 0 0.99 2-1 11 36.3 27 4 8 32
31 Postsea Ser 21-11 96 0 0.70 8-1 42 141.0 86 11 21 110
---------------------+--+--+----+---+--+-----+--+--+--+---
Batting
Glossary
Year Round Opp  G PA AB R H RBI BB SO   BA  OBP  SLG  OPS
----+--+--+---+--+--+--+-+-+---+--+--+----+----+----+----
1995 ALDS SEA 0 0 0 0 0 0 0 0 .000 .000 .000 .000
1996 ALDS TEX 0 0 0 0 0 0 0 0 .000 .000 .000 .000
ALCS BAL 0 0 0 0 0 0 0 0 .000 .000 .000 .000
WS ATL 2 1 1 0 0 0 0 0 .000 .000 .000 .000
1997 ALDS CLE 0 0 0 0 0 0 0 0 .000 .000 .000 .000
1998 ALDS TEX 0 0 0 0 0 0 0 0 .000 .000 .000 .000
ALCS CLE 0 0 0 0 0 0 0 0 .000 .000 .000 .000
WS SDP 2 1 1 0 0 0 0 0 .000 .000 .000 .000
1999 ALDS TEX 0 0 0 0 0 0 0 0 .000 .000 .000 .000
ALCS BOS 0 0 0 0 0 0 0 0 .000 .000 .000 .000
WS ATL 1 0 0 0 0 0 0 0 .000 .000 .000 .000
2000 ALDS OAK 0 0 0 0 0 0 0 0 .000 .000 .000 .000
ALCS SEA 0 0 0 0 0 0 0 0 .000 .000 .000 .000
WS NYM 2 1 1 0 0 0 0 0 .000 .000 .000 .000
2001 ALDS OAK 0 0 0 0 0 0 0 0 .000 .000 .000 .000
ALCS SEA 0 0 0 0 0 0 0 0 .000 .000 .000 .000
WS ARI 1 0 0 0 0 0 0 0 .000 .000 .000 .000
2002 ALDS ANA 0 0 0 0 0 0 0 0 .000 .000 .000 .000
2003 ALDS MIN 0 0 0 0 0 0 0 0 .000 .000 .000 .000
ALCS BOS 0 0 0 0 0 0 0 0 .000 .000 .000 .000
WS FLA 1 0 0 0 0 0 0 0 .000 .000 .000 .000
2004 ALDS MIN 0 0 0 0 0 0 0 0 .000 .000 .000 .000
ALCS BOS 0 0 0 0 0 0 0 0 .000 .000 .000 .000
2005 ALDS LAA 1 0 0 0 0 0 0 0 .000 .000 .000 .000
2006 ALDS DET 0 0 0 0 0 0 0 0 .000 .000 .000 .000
2007 ALDS CLE 0 0 0 0 0 0 0 0 .000 .000 .000 .000
2009 ALDS MIN 0 0 0 0 0 0 0 0 .000 .000 .000 .000
ALCS LAA 1 0 0 0 0 0 0 0 .000 .000 .000 .000
WS PHI 2 0 0 0 0 0 0 0 .000 .000 .000 .000
2010 ALDS MIN 0 0 0 0 0 0 0 0 .000 .000 .000 .000
ALCS TEX 0 0 0 0 0 0 0 0 .000 .000 .000 .000
2011 ALDS DET 0 0 0 0 0 0 0 0 .000 .000 .000 .000
----+--+--+---+--+--+--+-+-+---+--+--+----+----+----+----
1 Lg Div Ser 1 0 0 0 0 0 0 0 .000 .000 .000 .000
1 Lg Champ Ser 1 0 0 0 0 0 0 0 .000 .000 .000 .000
7 World Ser 11 3 3 0 0 0 0 0 .000 .000 .000 .000
9 Postsea Ser 13 3 3 0 0 0 0 0 .000 .000 .000 .000
----+--+--+---+--+--+--+-+-+---+--+--+----+----+----+----

Awards
1999
MLB - WS MVP
2003
ALCS - MVP


Special thanks to Baseball-Reference.com for the data.