GLENDALE, Ariz. -- A daily review of the hot topics coming out of Arizona Cardinals training camp:

• He’s been one of the talks of camp, but Michael Floyd put his offseason improvement on display Tuesday. On one pass, Floyd got a step behind cornerback Patrick Peterson for a touchdown that sailed in just beyond Peterson’s reach. Floyd then hauled in another score over cornerback Justin Bethel. Earlier Tuesday, quarterback Carson Palmer praised Floyd’s size and his ability to overpower cornerbacks, which was the case Tuesday. Bethel is listed as 6-0 and Peterson 6-1, but Floyd played taller and bigger than the 6-2, 220 pounds he’s listed as.

• Arizona got a look at a few backups that were called upon in a pinch. With RB Andre Ellington (neck) and CB Antonio Cromartie (pectoral) out Tuesday, RB Stepfan Taylor and CB Jerraud Powers were inserted into their respective first-team spots. NT Christian Tupou (groin), who was already replacing Dan Williams, was replaced by a combination of players, including Anthony McCloud.

≺ Taylor filling in for Ellington was telling in terms of the battle for the second running back job. It’s between Taylor and Jonathan Dwyer, but with head coach Bruce Arians’ decision to run Taylor with the starters, it appears that he’s leading the backup running back race. The importance of winning the second spot this year is greater than past years because of Arians’ decision to use more two-back sets.

• Arians got what he wanted when it came to adding speed to the offense. On at least two occasions, Ted Ginn and John Brown had to slow down to haul in a Carson Palmer pass. That speed could be a blessing and a curse. Last season, Palmer had a knack for slightly underthrowing receivers, forcing them to come back for passes. Ginn and Brown will have to learn how to time their runs perfectly with Palmer’s passes.

• Rookie safety Deone Bucannon secured an interception that got the crowd riled up.

• Rookie kicker Chandler Catanzaro, who Arians praised Tuesday morning for being perfect through camp, missed three kicks in row during the afternoon practice. The three he missed were end-over-end kicks, different from his regular kicks. By my count, Catanzaro went 7-for-10, missing field goals from 41, 47 and 48 yards.

• After Catanzaro came off the field, special teams coordinator Amos Jones pulled his young kicker off to the side for a short talk near a water cooler. By Catanzaro’s body language, it was clear he wasn’t happy with himself.