"It's pretty cut-and-dried," Asche said. "I've got to earn everything I want. There's no silver platter here with my name on it. I've got to earn it, and that's what I'm here to do.
"That's all you can really ask for as a player is opportunity. They're few and far between in this game, so you've got to take advantage when you're given them."
Asche missed all of Spring Training and the season's first two months with an oblique injury. He hit .169 with four home runs and eight RBIs in 15 games while rehabbing at three Minor League levels. The 25-year-old batted .245 with 12 home runs and 39 RBIs in 129 games for Philadelphia last season.
Lough, 30, was hitting .239 with three doubles and four RBIs in 30 games for the Phillies this season. He is a .254 career hitter in parts of five seasons with the Royals, Orioles and Phils.
Manager Pete Mackanin said Asche, who was converted from third base last year, will be used strictly in left. That means Tyler Goeddel will be moved to right for the time being.
"Nothing's set in stone," Mackanin added. "I hope [Asche] can add some offense to what we've got. We've got to get on track and win some games."
Going into play Thursday, the Phillies had lost six straight, scoring three or fewer runs in each of those games.
When Asche was first sidelined, it was thought he might be ready by Opening Day.
"It feels like an eternity," he said. "I didn't expect it to take this long, but I think I've done a good job of forgetting about that and kind of just staying on a path of looking forward. This is Day One for me. The past is in the past, so I'm just going to move forward from here."
The Phils also activated left-hander Mario Hollands from the 15-day DL and optioned him to Triple-A Lehigh Valley. He is recovering from Tommy John surgery.