RIVERSIDE, Calif. – History was made on Saturday morning with Jessica Kain winning the Highlander Invitational 6k race and breaking her own school record in the process. Eva Rethmeier also moved into second on SDSU’s all-time list as the duo led the Aztecs to a season-best team finish in Riverside. Overall, San Diego State finished fifth in the field of 23 teams with 154 total points. Among the teams they bested were West Region No. 3-ranked California Baptist and Power 5-affiliate USC. Kain posted a time of 19:58.3 in her victory, shattering her previous school record by nearly a full…