The Philadelphia Union’s season is slated to start in four days. The team running through its drills for the better part of two hours at the Bubble, the University of Penn’s Dunning-Cohen Champions’ Field, Tuesday morning didn’t seem like it was preparing for anything else. There’s uncertainty league wide, with the pall of CBA negotiations hanging over the start of the season. But on the field, there were a few notable points to the Union’s first training session in the Philadelphia in a month.

- First, the absences. Fernando Aristeguieta was in Venezuela tending to visa issues (something Union fans recall all too vividly from last summer.) Technical director Chris Albright said that the club expects Aristeguieta back Thursday at the latest. Also absent was the injured Andre Blake and Eric Bird, who remains with the team. It’s a groin injury on Bird, a problem that dogged him in college. Both of the Union’s MLS Players Union reps, Danny Cruz and Brian Carroll, remained in Washington for CBA negotiations.

- Among those present were trialists Eric Ayuk and draft pick Raymond Lee. It sounds as though the Cameroonian winger and the fullback from Saint Louis may hang around for a while.

- Conor Casey didn’t take part in half-field 7-on-7 drills getting his legs attended to. The striker did start in the final preseason game against

- On the field, Zach Pfeffer continued to look impressive, looking a bit more physical and sporting a beard. Sebastien Le Toux scored several goals on 7-on-7, while Union practice was plenty loud thanks to how vocal new signing Steven Vitoria is, complementing well with Ethan White and Rais M’Bolhi. Manager Jim Curtin was impressed by his team's sharpness after a couple of days off. It was likely one of the more intense practices of the week, with snow threatening Thursday's session.