LOS ANGELES — The game of musical chairs that is the Los Angeles Dodgers’ active roster continued Friday afternoon. Before their series opener against the Philadelphia Phillies, the Dodgers optioned a scuffling Hyeseong Kim to Triple-A Oklahoma City, placed Teoscar Hernández on the injured list with a Grade 1 left hamstring strain, re-signed Santiago Espinal and recalled Ryan Ward. The slew of moves indicates another depth test for the Dodgers, despite them winning 12 of their last 14 games and surging to a season-high 16 games over .500.“It’s always front of mind to be able to build depth, because things happen,” general manager Brandon Gomes said Friday. “Sometimes they time out where they’re on top of each other. The injuries being spaced out would obviously be a lot better, but that’s not how it works out.“But right now we feel — knock on wood — that our depth is in a decent spot.”Let’s break down the questions surrounding the current state of the Dodgers and how manager Dave Roberts is divvying up playing time among his new position group.Why was Kim optioned and Espinal re-signed?The Dodgers had contemplated sending Kim down throughout the week. Kim’s chase rate had spiked, and the club felt he had regressed to swing habits they tried to break last season.“There’s some stuff in his setup, and it started to drift to a little bit more like what we saw last year,” Gomes said. “Thought when he first came up, he’d done some really good work with our hitting guys down in Triple A. So our guys are going to get together as a group and put together a plan and get with (hitting coach) Dylan (Nasiatka) in OKC and hopefully get him back to where he was earlier in the season.”Kim showed much better plate discipline and pitch selection in April, areas the Dodgers stressed he needed to improve on. But throughout May, the whiff and strikeout rate started to climb. Kim owned a .553 OPS in May over 22 games with his season chase rate (29.26 percent), whiff rate (27 percent) and strikeout rate (23.7 percent) all worse than league average.“I think his swing has changed,” Roberts said. “He’s losing his legs a little bit. I think he’s coming around the ball a little bit, there’s a lot more swing-and-miss than there was early. … He is just playing a little bit more tentative and not as free and easy as he was some parts of last year and early on.”Espinal, who was designated for assignment Monday when Kiké Hernández was activated off the 60-day injured list, returns in the same role he had. He’ll be used for depth around the infield and could see time in the corner outfield if necessary. The Dodgers were hopeful they’d be able to retain Espinal even before Hernández landed back on the IL with a severe oblique strain. Espinal remained in the Los Angeles area, and when he cleared waivers, the club was eager to re-sign him. He will be in Saturday’s starting lineup against Phillies left-hander Jesús Luzardo. To make room for Espinal on the 40-man roster, Blake Snell was transferred to the 60-day IL.