Exhibit 10.20a

AMENDMENT to LEVEL 5

EMPLOYMENT AGREEMENT

THIS AMENDMENT (the “Amendment”), effective as of April 17, 2000, by and between PSS World Medical, Inc., a Florida corporation (the “Company”), and the officer of the Company whose signature appears below (“Executive”), amends that certain Employment Agreement, dated as of the date indicated below, by and between the Company and Executive, as heretofore amended (the “Employment Agreement”).

In consideration of the mutual promises and covenants herein contained, the parties hereto agree as follows:

1. Section 3 of the Employment Agreement is hereby amended by adding the following sentence at the end thereof:

“Notwithstanding the foregoing, if a Change of Control occurs the Employment Period shall be automatically extended through the later of (i) the first anniversary of the Change of Control, or (ii) the normal expiration of the then-current term, including any prior extensions.”

2. Section 6 of the Employment Agreement is hereby amended by deleting in its entirety the definition of Change of Control and substituting therefor the following:

A “Change of Control” shall mean:

(a) The acquisition by any individual, entity or group (within the meaning of Section 13(d)(3) or 14(d)(2) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) (a “Person”) of beneficial ownership (within the meaning of Rule 13d-3 promulgated under the Exchange Act) of 35% or more of the combined voting power of the then outstanding voting securities of the Company entitled to vote generally in the election of directors (the “Outstanding Company Voting Securities”); provided, however, that for purposes of this subsection (a), the following acquisitions shall not constitute a Change of Control: (i) any acquisition by any employee benefit plan (or related