Newsroom GuidelinesNews TipsContact UsReport an Error LOS ANGELES >> Youth served the Dodgers well in their run to a fourth consecutive National League West title and they will rely on it to help carry them in the postseason.Though it does not have to be submitted until the morning of Game 1 Friday, Dodgers manager Dave Roberts outlined the postseason roster before Tuesday’s workout. Seven rookies will be on it (four of whom made their major-league debuts in 2016). Ten players who spent time in the minors this season — not including rehab assignments and Kenta Maeda’s brief procedural move to an Arizona Summer League roster.“It was probably the most challenging roster construction for the playoffs that I’ve ever been a part of,” Dodgers president of baseball operations Andrew Friedman said. “That’s a testament to the number of players that have contributed to getting us into the postseason.• VIDEO: Sights and sounds from Tuesday’s workout “We’ve talked about this all year. I think the environment Dave (Roberts) and the coaches and the veteran players have created has allowed those guys to come up and be comfortable and that’s something we expect to carry on.”Left off the postseason roster were six veterans who made a combined $55 million this season — veteran starters Brandon McCarthy, Scott Kazmir and Brett Anderson, relievers J.P. Howell and Jesse Chavez as well as left-hander Hyun-Jin Ryu, who had elbow surgery a week ago.None of those were surprising — though both Friedman and Roberts said leaving Howell off the roster was a difficult decision. Though the 33-year-old Howell did not pitch well this year and slid into a less-prominent role as the season progressed, he was “a huge part of the success of the bullpen with his mentorship” of the younger pitchers, Friedman said.“That was a tough one,” Roberts said. “He’s a guy that for me is one of the glue guys for our team this year.”Howell, along with rookies Rob Segedin and Brock Stewart and another left-hander, Alex Wood, will travel with the team during the first round of the playoffs as a “taxi squad.” Wood made it back from elbow surgery in July in time to make a bid for the postseason roster with four appearances in the past two weeks. He was left off the roster in favor of a third catcher, rookie Austin Barnes. Carrying three catchers gives Roberts the freedom to use backup Carlos Ruiz as a pinch-hitter against the Nationals’ left-handed pitchers.Utility man Kiké Hernandez did not make the roster either. He will be part of a group of players sent to the Dodgers’ training complex in Arizona to “stay hot” in case they are needed during the postseason.“He’s a very dynamic player but he didn’t have the year he would have liked to have had,” Roberts said of Hernandez, who hit .190 this season. “I just wanted to see the at-bat quality get better this past month. We felt maybe not to have him on the roster this first round, get him away from it a little bit to reset, get his swing right and to be back potentially in the NLCS.”The roster expected to be announced Friday:Pitchers (11) – Clayton Kershaw, Kenta Maeda, Rich Hill, Julio Urias, Kenley Jansen, Joe Blanton, Josh Fields, Pedro Baez, Luis Avilan, Grant Dayton, Ross StriplingCatchers (3) – Yasmani Grandal, Carlos Ruiz, Austin BarnesInfielders (5) – Adrian Gonzalez, Corey Seager, Charlie Culberson, Chase Utley, Justin TurnerOutfielders (6) – Andre Ethier, Yasiel Puig, Joc Pederson, Howie Kendrick, Andrew Toles, Josh Reddick.NotesToles wore a brace on his sore left wrist and did not participate in Tuesday’s workout at Dodger Stadium. Toles did not play in the final two games of the regular season. But Roberts said he expects Toles to be ready for Game 1 on Friday. “If there was a game today, he’d be playing,” Roberts said. “He’s fine.” … Urias and Stripling threw to hitters in a simulated-game setting after Tuesday’s workout. Urias will start Game 4 if Kershaw doesn’t come back on short rest — a decision Friedman said won’t be made until the series begins to play out.