Here's a list of every season that a pitcher registered at least 20 saves and 10 losses. There are 40 of them with the earliest being in 1965. So on average there should be about 1 of these occurrances per season. If your league has considerably more than that, then there's an issue.
Code:
year Last First Team W L SV IP ERA
1979 Garber Gene ATL 6 16 25 106.0 4.33
1979 Marshll Mike MIN 10 15 32 142.7 2.65
1970 Knowles Darold WS2 2 14 27 119.3 2.04
1978 Fingers Rollie SDN 6 13 37 107.3 2.52
1970 Wood Wilbur CHA 9 13 21 121.7 2.81
1971 Sanders Ken ML4 7 12 31 136.3 1.91
1977 Hough Charlie LAN 6 12 22 127.3 3.32
1974 Marshll Mike LAN 15 12 21 208.3 2.42
1978 Marshll Mike MIN 10 12 21 99.0 2.45
1980 Tekulve Kent PIT 8 12 21 93.0 3.39
1973 Marshll Mike MON 14 11 31 179.0 2.66
1984 Davis Ron MIN 7 11 29 83.0 4.55
1978 Gossage Rich NYA 10 11 27 134.3 2.01
1965 Radatz Dick BOS 9 11 22 124.3 3.91
1983 Minton Greg SFN 7 11 22 106.7 3.54
1989 Boever Joe ATL 4 11 21 82.3 3.94
1976 Fingers Rollie OAK 13 11 20 134.7 2.47
2002 Jimenez Jose COL 2 10 41 73.3 3.56
1986 Worrell Todd SLN 9 10 36 103.7 2.08
1987 Smith Lee CHN 4 10 36 83.7 3.12
1983 Stanley Bob BOS 8 10 33 145.3 2.85
1989 Jones Doug CLE 7 10 32 80.7 2.34
1969 Pernski Ron MIN 9 10 31 119.7 2.11
1985 Hernadz Willie DET 8 10 31 106.7 2.7
1982 Garber Gene ATL 8 10 30 119.3 2.34
1983 Smith Lee CHN 4 10 29 103.3 1.65
1984 Holland Al PHI 5 10 29 98.3 3.39
1988 Davis Mark SDN 5 10 28 98.3 2.01
1978 Sutter Bruce CHN 8 10 27 99.0 3.18
1993 Jones Doug HOU 4 10 26 85.3 4.54
1980 Hume Tom CIN 9 10 25 137.0 2.56
2001 Lowe Derek BOS 5 10 24 91.7 3.53
1980 Allen Neil NYN 7 10 22 97.3 3.7
1984 Stanley Bob BOS 9 10 22 106.7 3.54
1965 McCool Billy CIN 9 10 21 105.3 4.27
1982 Spillnr Dan CLE 12 10 21 133.7 2.49
1983 Sutter Bruce SLN 9 10 21 89.3 4.23
2005 Brazobn Yhency LAN 4 10 21 72.7 5.33
1974 Murphy Tom ML4 10 10 20 123.0 1.9
2003 Jimenez Jose COL 2 10 20 101.7 5.22