Head coach John Harbaugh kept his players plugging along on a sun-drenched afternoon for football practice Friday and insisted his New York Giants were progressing nicely. Of course, there had to be a couple of caveats - one positive and one negative. On the bright side, first-round linebacker Arvel Reese signed his rookie contract, meaning the entire draft class has taken care of its business. But on the flip side, veteran kick returner/wide receiver Gunner Olszewski suffered what appeared to be a non-contact leg injury late in the session and had to be carted off the field. The initial diagnosis was a torn Achilles tendon, according to ESPN's Adam Schefter , who said more tests were on the way. "[We] did have the unfortunate incident at the end with Gunner," Harbaugh said. "We'll find out what the situation is with that. That was a non-contact change-of-direction kind of a deal there in the grass, so that was disappointing.…