+/- for WVU -- Why does Traylor get minutes?

Game No. ------>     23            
Date:  2/6/2016
Opponent: TCU
Location:  Forth Worth (Ed and Rae Schollmaier Arena)
                                 (+/-)                 x-(+/-)   
                                  per                   per     
Rnk  Player       Min   (+/-)     Min    x-Min  x(+/-)  x-Min     Δ  
***  **********  *****  *****    *****   *****  *****  ******   *****
  1  Ellis        38.1     12     0.32     1.9     -2    -1.03    1.34 
  2  Selden       25.7     15     0.58    14.3     -5    -0.35    0.93 
  3  Lucas        29.5     13     0.44    10.6     -3    -0.28    0.73 
  4  Bragg         1.3      1     0.79    38.7     9     0.23     0.56 
  5  Mason        36.4     10     0.27     3.6     0     0.00     0.27 
  6  Graham       37.8     10     0.26     2.2     0     0.00     0.26 
  7  Manning       0.0      0     0.00    40.0    10     0.25     -0.25
  8  Young         0.0      0     0.00    40.0    10     0.25     -0.25
  9  Vick          0.0      0     0.00    40.0    10     0.25     -0.25
 10  Mickelson     0.0      0     0.00    40.0    10     0.25     -0.25
 11  Self          0.0      0     0.00    40.0    10     0.25     -0.25
 12  Greene       15.9      -3    -0.19   24.2    13     0.54     -0.73
 13  Mykhailiuk    4.2      -2    -0.48   35.8    12     0.34     -0.81
 14  Traylor       9.3      -4    -0.43   30.7    14     0.46     -0.89
 15  Diallo        2.0      -2    -1.03   38.1    12     0.32     -1.34
                
2016 Season Total                    
Through  23  Games                
                                 (+/-)                 x-(+/-)   
                                  per                   per     
Rnk  Player       Min   (+/-)     Min    x-Min  x(+/-)  x-Min     Δ  
***  **********  *****  *****    *****   *****  *****  ******  *****
  1  Ellis         702    294     0.42     238    30     0.13     0.29 
  2  Selden        672    289     0.43     268    35     0.13     0.30 
  3  Mason         772    269     0.35     168    55     0.33     0.02 
  4  Graham        738    212     0.29     202   112     0.56     -0.27
  5  Mykhailiuk    276    123     0.45     664   201     0.30     0.14 
  6  Mickelson     167    114     0.68     773   210     0.27     0.41 
  7  Bragg         231     83     0.36     709   241     0.34     0.02 
  8  Lucas         309    118     0.38     631   206     0.33     0.06 
  9  Greene        241     69     0.29     699   255     0.36     -0.08
 10  Traylor       298     18     0.06     642   306     0.48     -0.42
 11  Diallo        154     43     0.28     787   281     0.36     -0.08
 12  Vick           75      8     0.11     865   316     0.37     -0.26
 13  Manning        25      -3    -0.12    915   327     0.36     -0.48
 14  Young          18      -7    -0.39    922   331     0.36     -0.75
 15  Self           24     -10    -0.41    916   334     0.36     -0.78