The Loss Factor is simply the sum of all weighted losses by a team but does not include intersectional games. Losses are weighted as follows: Losing to the top 20% of rated teams is 0.2, to the second 20% is 0.4, and so on to the bottom 20%, which is 1.0. This component is meant to complement the Quality Win Factor, which benefits a team for beating a quality opponent.

Below is an example of the weighted losses for Men's Division I Lacrosse for 2009. As an example, Notre Dame lost to Maryland, which was ranked in the top 20%.

    No Team                             W     L     T       Weighted
Losses
1 Notre Dame 15 1 0 0.2000
2 Syracuse 16 2 0 0.4000
3 Virginia 15 3 0 0.6000
4 Duke 15 4 0 0.8000
5 Princeton 13 3 0 0.8000
6 Cornell 13 4 0 1.0000
7 Hofstra 11 4 0 1.0000
8 Johns Hopkins 10 5 0 1.0000
9 Loyola 9 5 0 1.2000
10 North Carolina 12 6 0 1.2000
11 Brown 12 4 0 1.4000
12 Navy 11 5 0 1.4000
13 UMBC 12 4 0 1.4000
14 Colgate 9 6 0 1.6000
15 Harvard 8 5 0 1.6000
16 Bryant 10 5 0 1.8000
17 Stony Brook 9 6 0 1.8000
18 Maryland 10 7 0 1.8000
19 Massachusetts 9 6 0 2.2000
20 Penn State 9 5 0 2.4000
21 Albany 7 7 0 2.6000
22 Bucknell 9 7 0 2.6000
23 Fairfield 7 6 0 2.6000
24 Ohio State 8 8 0 2.6000
25 Yale 5 8 0 2.6000
26 Georgetown 7 7 0 2.8000
27 Siena 12 6 0 2.8000
28 Villanova 11 6 0 2.8000
29 Hobart 7 7 0 3.0000
30 Penn 5 8 0 3.0000
31 Lafayette 6 7 0 3.4000
32 Air Force 7 7 0 3.4000
33 Denver 7 8 0 3.6000
34 Towson 7 10 0 3.6000
35 Robert Morris 9 7 0 3.8000
36 Army 6 10 0 4.0000
37 St. John's 5 9 0 4.2000
38 Dartmouth 4 11 0 4.4000
39 Drexel 7 8 0 4.6000
40 Bellarmine 6 8 0 4.8000
41 Delaware 5 10 0 4.8000
42 Rutgers 4 11 0 4.8000
43 Binghamton 3 12 0 5.0000
44 Vermont 4 10 0 5.0000
45 Quinnipiac 4 9 0 5.2000
46 Manhattan 10 8 0 5.4000
47 Canisius 4 9 0 5.6000
48 Providence 6 10 0 5.8000
49 Lehigh 4 11 0 6.0000
50 Mount St. Mary's 5 10 0 6.2000
51 Sacred Heart 4 10 0 6.4000
52 Holy Cross 3 12 0 6.6000
53 Saint Joseph's 6 9 0 6.6000
54 Detroit 0 11 0 7.0000
55 Marist 4 9 0 7.4000
56 Hartford 2 11 0 7.8000
57 Presbyterian 1 11 0 7.8000
58 VMI 3 11 0 8.4000
59 Wagner 1 15 0 13.2000

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