UNITED STATES
                                 SECURITIES AND EXCHANGE COMMISSION
                                             WASHINGTON, D.C. 20549


    DIVISION OF
CORPORATION FINANCE



March 16, 2020

  Dennis J. Block, Esq.
  Greenberg Traurig, LLP
  MetLife Building
  200 Park Avenue
  New York, NY 10166

          Re:     Mack-Cali Realty Corporation
                  DEFA14A filed March 16, 2020
                  File No. 001-13274

  Dear Mr. Block:

       We have reviewed the above-captioned filing, and have the following
comment. Our
  comment may ask for additional information so that we may better understand
the disclosure.

         Please respond to this letter by amending the filing and/or by
providing the requested
  information. If you do not believe our comment applies to your facts and
circumstances and/or
  do not believe an amendment is appropriate, please tell us why in a written
response.

         After reviewing any amendment to the filing and any information
provided in response to
  this comment, we may have additional comments. Capitalized terms used but not
defined herein
  have the same meaning ascribed to them in the filing.

  Schedule 14A

  General

  1. Communications made in reliance on Rule 14a-12 must identify the
participants in the
     solicitation and describe the participants' "direct or indirect
interests." The Company and its
     fellow participants did not include this information in its soliciting
material filed on
     March 16 but instead referred security holders to the as-yet-unfiled
"definitive proxy
     statement and other relevant solicitation materials filed by the Company."
Please note that
     the legend must advise security holders where they can currently obtain
such information as
     opposed to referring them to future filings. See Rule 14a-12(a)(l)(i) and
SEC Release No.
     33-7760, including the release text accompanying footnote 77 (October 22,
1999). Please
     provide this information in all future soliciting materials.

          We remind you that the participants are responsible for the accuracy
and adequacy of
  their disclosures, notwithstanding any review, comments, action or absence of
action by the staff.
 Dennis J. Block, Esq.
March 16, 2020
Page 2

        You may contact me at (202) 551-8094 with any questions.


                                                        Sincerely,

                                                        /s/ David M. Plattner

                                                        David M. Plattner
                                                        Special Counsel
                                                        Office of Mergers and
Acquisitions