Players, even returning players, are nervous AF for the first few games of each season. Guys will settle in and be fine.
That said, there is a lot of guys capable of being starting position players so those that have been in the lineup the first couple games and aren't producing maybe should start looking over their shoulder. We've seen it year in and year out. The lineup to start the year changes dramatically as the season progresses
Sensley will get healthy. Jam had a good offseason. Poncho hasn't appeared yet. Ray hasn't played. There's a lot of talent available so the guys in the lineup better get it straight.