Does lack of changes in Clemens’ physical appearance prove that he hasn’t used steroids?

It is known by each baseball fan that Roger Clemens is charged with obstruction of justice. It is affirmed that he has lied before Congress about application of steroids and HGH.
The attorney Rusty Hardin noticed that Roger Clemens’ physical appearance didn’t change greatly before, during and after his working with Brian McNamee. The attorney affirmed that this aspect proved that Roger Clemens hadn’t taken steroids and other related drugs.
Increase of muscle mass is normally used by prosecutors as proof that a sportsperson administers steroids or/and other related products. But this tendency was not utilized during the governmental case against Roger Clemens. Nobody could confirm that muscles of Roger Clemens manifested that he had taken steroids and HGH. It is a difference between the case against Roger Clemens and that against Barry Bonds.
When it comes to the governmental case against Barry Bonds, feds called many persons in the trial that were able to testify that anabolic steroids promoted great changes in physique of this athlete. They affirmed that intake of steroids led to enhancement of muscle size, enhanced size of the head and testicular atrophy in Barry Bonds.
Thus, Rusty Hardin provided four photos of Roger Clemens. The photos manifested physical appearance of Roger Clemens, including the period of time when Clemens was working with the trainer Brian McNamee. The attorney pointed out that the photos showed that there were no changes in physical appearance that could support that he took steroids and HGH.
The attorney Rusty Hardin noticed that the photos displayed just the process of ageing. The masseur Cheryl Redfern also confirmed that she didn’t observe any changes in physique of Roger Clemens. Roger Clemens experienced neither back acne, nor gynecomastia, nor essentially increased muscle size.
Phil Garner a former Major League Baseball player also affirmed that there were not any significant changes in physical appearance and performance of Roger Clemens during working with the coach Brian McNamee.
The Assistant US Attorney Steve Durham put efforts to discredit the affirmation about lack of changes in Roger Clemens’ physical appearance during the cross-examination of Phil Garner. He claimed that while some steroids enhanced muscle size, others didn’t promote getting muscles. Thus, he affirmed that the photos could say nothing about steroid use.
Federal prosecutors want to take advantages in both cases: in the case against Roger Clemens and in that against Barry Bonds. While they affirm that physical changes in Barry Bonds display that he has utilized steroids, lack of changes in physical appearance of Roger Clemens doesn’t prove that he hasn’t administered steroids.