Bill Center, longtime sportswriter for U-T San Diego, is an employee of the Padres.
Left fielder Justin Upton and catcher Derek Norris didn't start Sunday against St. Louis. A day earlier, right fielder Matt Kemp was out of the lineup.
Kemp has appeared in 83 of the Padres' 84 games and started 81. Upton has played in 82 of the 84 games with 80 starts. Norris has started 71, including 67 behind the plate.
"Upton, Kemp, Norris can't do it every night," Padres manager Pat Murphy said Sunday morning while also discussing the recent contributions of infielders Yangervis Solarte and Jedd Gyorko and backup catcher Austin Hedges.