San Diego has been eliminated from first place.

To show that San Diego is eliminated from first place, we start with the current standings:
            Team	W	L	GL	PCT	GB
     Los Angeles	98	64	0	0.605	0.0
       San Diego	93	69	0	0.574	5.0
         Arizona	89	73	0	0.549	9.0
   San Francisco	80	82	0	0.494	18.0
        Colorado	61	101	0	0.377	37.0
           Total	421	389	0

San Diego can finish the season with at most 93 + 0 = 93 wins and will finish the season behind the following teams:
Los Angeles has already won 98 games.
# San Diego Padres' magic number
# San Diego's magic number
# Padres' magic number
# MLB Playoff Race