This entry lists the best and worst for the past 30 days of the 2017 regular season, through games of Sunday, June 19. Here is an explanation of this weekly feature.

Comment of the week: I started doing this feature this season on May 9. This is the first time since then–this is the sixth report since that date–that the American League team with the best record over the past 30 days has not been the Houston Astros. And they were second-best on May 9 as well as today.

American League
   Team W-L              
1. Boston           18-10
2. Houston          17-11
3. Toronto          15-10
4. Kansas City      16-11
5. Cleveland        15-12
       
   Worst Team W-L        
1. Baltimore        10-18
2. Detroit          12-16
3. Texsas           11-14
4. Oakland          12-15
5. Minnesota        13-16

   Batting Average       
1. Gamel, Sea        .384
2. Altuve, Hou       .361
3. Encarnacion, Cle  .352
4. Gregorius/Judge,  .350
   NY; Ramirez, Cle  
       
   On Base Percentage    
1. Judge, NY         .472
2. Encarnacion, Cle  .437
3. Joyce, Oak        .435
4. Altuve, Hou       .431
5. Avila, Det        .427

   Slugging Percentage   
1. Encarnacion, Cle  .705
2. Judge, NY         .699
3. Healy, Oak        .694
4. Smoak, To         .656
5. Springer, Hou     .649
     
   On Base Plus Slugging 
1. Judge, NY        1.171
2. Encarncion, Cle  1.141
3. Springer, Hou    1.049
4. Healy, Oak       1.037
5. Smoak, Tor       1.019

   Worst OPS             
1. Pillar, Tor       .516
2. Escobar, KC       .525
3. Hardy, Bal        .631
4. Buxton, Min       .634
5. Headley, NY       .652
          
   Home Runs             
1. Healy, Oak          10
   Morrison, TB        10
   Smoak, Tor          10
   Springer, Hou       10
5. Three with           9
 
   Runs                  
1. Judge, NY           28
2. Springer, Hou       25
3. Cain, KC            23
   Dickerson, TB       23
   Encarnacion, Cle    23

   RBI                   
1. Healy, Oak          26
2. Judge, NY           24
   Upton, Det          24
   Zunino, Sea         24
5. Four with           23
       
   Stolen Bases          
1. Maybin, LA          12
2. Buxton, Min          9
3. Andrus, Tex          8
   DeShields, Tex       8
   Simmons, LA          8
  
   Saves                 
1. Osuna, Tor          12
2. Colome, TB           8
   Kimbrel, Bos         8
4. Herrera, KC          7
5. Two with             6
 
   ERA                   
1. Sabathia, NY      1.21
2. Pelfrey, Chi      1.97
3. Severino, NY      2.10
4. Fiers, Hou        2.25
5. Montgomery, NY    2.43

   Worst ERA             
1. Gallardo, Chi     9.00
2. Kennedy, KC       7.67
3. Gonzalez, Chi     7.62
4. Bergman, Sea      7.12
5. Tanaka, NY        7.11
 
   FIP                   
1. Sale, Bos         1.90
2. Gray, Oak         2.16
3. Archer, TB        2.33
4. Severino, NY      2.66
5. Fulmer, Det       2.74
 
   WHIP                  
1. Severino, NY      0.93
2. Sabathia, NY      0.94
3. Stroman, Tor      1.01
4. Manaea, Oak       1.03
5. Montgomery, NY    1.04
 
   Strikeouts            
1. Archer, TB          57
2. Sale, Bos           41
   Tanaka, NY          41
4. Manaea, Oak         39
5. Two with            38
National League
   Team W-L
1. Arizona          19- 8
   Los Angeles      19- 8
3. Colorado         19-10
4. Miami            16-10
5. Washington       17-11

   Worst Team W-L
1. Philadelphia      7-22
2. San Francisco     8-20
3. St. Louis        10-19
4. Cincinnati       10-17
5. Milwaukee        13-15
   
   Batting Average     
1. Mercer, Pit      .381
2. Murphy, Was      .376
3. Goldschmidt, Ari .354
4. Gordon, Mia      .3519
5. Peralta, Ari     .3516
 
   On Base Percentage  
1. Rizzo, Chi        .453
2. Goldschmidt, Ari  .439
3. Votto, Cin        .424
4. Mercer, Pit       .423
   Posey, SF         .423

   Slugging Percentage  
1. Rizzo, Chi       .695
2. Rendon, Was      .655
3. Goldschmidt, Ari .6364
4. Adams, Atl       .6355
5. Mercer, Pit      .612

   On Base Plus Slugging
1. Rizzo, Chi       1.148
2. Goldschmidt, Ari 1.075
3. Rendon, Was      1.063
4. Mercer, Pit      1.052
5. Votto, Cin       1.047
      
   Worst OPS
1. Forsythe, LA      .522
2. Hamilton, Cin     .532
3. Cordoba, SD       .545
4. Reyes, NY         .553
5. Grandal, LA       .598

   Home Runs
1. Bellinger, LA       11
2. Adams, Atl           9
   Rizzo, Chi           9
4. Four  with           8
   
   Runs    
1. Blackmon, Col       29
2. Goldschmidt, Ari    26
3. Gordon, Mia         22
   Rizzo, Chi          22
5. Two with            21

   RBI      
1. Adams, Atl          25
   Arenado, Col        25
   Goldschmidt, Ari    25
   Lamb, Ari           25     
5. Three with          23 

   Stolen Bases          
1. Turner, Was         17
2. Gordon, Mia         13
3. Hamilton, Cin        9
4. Taylor, LA           7
5. Five with            6

   Saves
1. Rodney, Ari         10
2. Jansen, LA           7
   Knebel, Mil          7
   Maurer, SD           7
5. Four with            6  

   ERA
1. Ray, Ari          1.06
2. Scherzer, Was     1.60
3. Martinez, SL      1.77
4. McCarthy, LA      1.91
5. Volquez, Mia      2.25

   Worst ERA
1. Arroyo, Cin       8.80
2. Dickey, Ari       6.75
3. Wainwright, SL    6.37
4. Cain, SF          6.25
5. Lackey, Chi       5.82

   FIP
1. Martinez, SL      2.01
2. Nelson, Mil       2.34
3. Gonzalez, Was     2.38
4. Ray, Ari          2.45
5. Scherzer, Was     2.60

   WHIP
1. Scherzer, Was     0.71
2. Martinez, SL      0.79
3. Ray, Ari          0.83
4. McCarthy, LA      0.88
5. Anderson, Mil     0.91

   Strikeouts
1. Scherzer, Was       64
2. Strasburg, Was      56
3. Ray, Ari            55
4. Martinez, SL        50
5. Nelson, Mil         44